| Message ID | 20210120161658.3820610-1-arnd@kernel.org |
|---|---|
| State | New |
| Headers | show |
| Series | spi: remove sirf prima/atlas driver | expand |
Arnd Bergmann <arnd@kernel.org> 于2021年1月21日周四 上午5:17写道： > > From: Arnd Bergmann <arnd@arndb.de> > > The CSR SiRF prima2/atlas platforms are getting removed, so this driver > is no longer needed. > > Cc: Barry Song <baohua@kernel.org> > Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Barry Song <baohua@kernel.org> > --- > .../devicetree/bindings/spi/spi-sirf.txt | 42 - > drivers/spi/Kconfig | 7 - > drivers/spi/Makefile | 1 - > drivers/spi/spi-sirf.c | 1236 ----------------- > 4 files changed, 1286 deletions(-) > delete mode 100644 Documentation/devicetree/bindings/spi/spi-sirf.txt > delete mode 100644 drivers/spi/spi-sirf.c > > diff --git a/Documentation/devicetree/bindings/spi/spi-sirf.txt b/Documentation/devicetree/bindings/spi/spi-sirf.txt > deleted file mode 100644 > index ddd78ff68fae..000000000000 > --- a/Documentation/devicetree/bindings/spi/spi-sirf.txt > +++ /dev/null > @@ -1,42 +0,0 @@ > -* CSR SiRFprimaII Serial Peripheral Interface > - > -Required properties: > -- compatible : Should be "sirf,prima2-spi", "sirf,prima2-usp" > - or "sirf,atlas7-usp" > -- reg : Offset and length of the register set for the device > -- interrupts : Should contain SPI interrupt > -- resets: phandle to the reset controller asserting this device in > - reset > - See ../reset/reset.txt for details. > -- dmas : Must contain an entry for each entry in clock-names. > - See ../dma/dma.txt for details. > -- dma-names : Must include the following entries: > - - rx > - - tx > -- clocks : Must contain an entry for each entry in clock-names. > - See ../clocks/clock-bindings.txt for details. > - > -- #address-cells: Number of cells required to define a chip select > - address on the SPI bus. Should be set to 1. > -- #size-cells: Should be zero. > - > -Optional properties: > -- spi-max-frequency: Specifies maximum SPI clock frequency, > - Units - Hz. Definition as per > - Documentation/devicetree/bindings/spi/spi-bus.txt > -- cs-gpios: should specify GPIOs used for chipselects. > - > -Example: > - > -spi0: spi@b00d0000 { > - compatible = "sirf,prima2-spi"; > - reg = <0xb00d0000 0x10000>; > - interrupts = <15>; > - dmas = <&dmac1 9>, > - <&dmac1 4>; > - dma-names = "rx", "tx"; > - #address-cells = <1>; > - #size-cells = <0>; > - clocks = <&clks 19>; > - resets = <&rstc 26>; > -}; > diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig > index 74ea73a05981..855a1ee1c04c 100644 > --- a/drivers/spi/Kconfig > +++ b/drivers/spi/Kconfig > @@ -750,13 +750,6 @@ config SPI_SIFIVE > help > This exposes the SPI controller IP from SiFive. > > -config SPI_SIRF > - tristate "CSR SiRFprimaII SPI controller" > - depends on SIRF_DMA > - select SPI_BITBANG > - help > - SPI driver for CSR SiRFprimaII SoCs > - > config SPI_SLAVE_MT27XX > tristate "MediaTek SPI slave device" > depends on ARCH_MEDIATEK || COMPILE_TEST > diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile > index 6fea5821662e..6c79b83d5f4a 100644 > --- a/drivers/spi/Makefile > +++ b/drivers/spi/Makefile > @@ -105,7 +105,6 @@ obj-$(CONFIG_SPI_SH_HSPI) += spi-sh-hspi.o > obj-$(CONFIG_SPI_SH_MSIOF) += spi-sh-msiof.o > obj-$(CONFIG_SPI_SH_SCI) += spi-sh-sci.o > obj-$(CONFIG_SPI_SIFIVE) += spi-sifive.o > -obj-$(CONFIG_SPI_SIRF) += spi-sirf.o > obj-$(CONFIG_SPI_SLAVE_MT27XX) += spi-slave-mt27xx.o > obj-$(CONFIG_SPI_SPRD) += spi-sprd.o > obj-$(CONFIG_SPI_SPRD_ADI) += spi-sprd-adi.o > diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c > deleted file mode 100644 > index 8419e6722e17..000000000000 > --- a/drivers/spi/spi-sirf.c > +++ /dev/null > @@ -1,1236 +0,0 @@ > -// SPDX-License-Identifier: GPL-2.0-or-later > -/* > - * SPI bus driver for CSR SiRFprimaII > - * > - * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. > - */ > - > -#include <linux/module.h> > -#include <linux/kernel.h> > -#include <linux/slab.h> > -#include <linux/clk.h> > -#include <linux/completion.h> > -#include <linux/interrupt.h> > -#include <linux/io.h> > -#include <linux/of.h> > -#include <linux/bitops.h> > -#include <linux/err.h> > -#include <linux/platform_device.h> > -#include <linux/of_gpio.h> > -#include <linux/spi/spi.h> > -#include <linux/spi/spi_bitbang.h> > -#include <linux/dmaengine.h> > -#include <linux/dma-direction.h> > -#include <linux/dma-mapping.h> > -#include <linux/reset.h> > - > -#define DRIVER_NAME "sirfsoc_spi" > -/* SPI CTRL register defines */ > -#define SIRFSOC_SPI_SLV_MODE BIT(16) > -#define SIRFSOC_SPI_CMD_MODE BIT(17) > -#define SIRFSOC_SPI_CS_IO_OUT BIT(18) > -#define SIRFSOC_SPI_CS_IO_MODE BIT(19) > -#define SIRFSOC_SPI_CLK_IDLE_STAT BIT(20) > -#define SIRFSOC_SPI_CS_IDLE_STAT BIT(21) > -#define SIRFSOC_SPI_TRAN_MSB BIT(22) > -#define SIRFSOC_SPI_DRV_POS_EDGE BIT(23) > -#define SIRFSOC_SPI_CS_HOLD_TIME BIT(24) > -#define SIRFSOC_SPI_CLK_SAMPLE_MODE BIT(25) > -#define SIRFSOC_SPI_TRAN_DAT_FORMAT_8 (0 << 26) > -#define SIRFSOC_SPI_TRAN_DAT_FORMAT_12 (1 << 26) > -#define SIRFSOC_SPI_TRAN_DAT_FORMAT_16 (2 << 26) > -#define SIRFSOC_SPI_TRAN_DAT_FORMAT_32 (3 << 26) > -#define SIRFSOC_SPI_CMD_BYTE_NUM(x) ((x & 3) << 28) > -#define SIRFSOC_SPI_ENA_AUTO_CLR BIT(30) > -#define SIRFSOC_SPI_MUL_DAT_MODE BIT(31) > - > -/* Interrupt Enable */ > -#define SIRFSOC_SPI_RX_DONE_INT_EN BIT(0) > -#define SIRFSOC_SPI_TX_DONE_INT_EN BIT(1) > -#define SIRFSOC_SPI_RX_OFLOW_INT_EN BIT(2) > -#define SIRFSOC_SPI_TX_UFLOW_INT_EN BIT(3) > -#define SIRFSOC_SPI_RX_IO_DMA_INT_EN BIT(4) > -#define SIRFSOC_SPI_TX_IO_DMA_INT_EN BIT(5) > -#define SIRFSOC_SPI_RXFIFO_FULL_INT_EN BIT(6) > -#define SIRFSOC_SPI_TXFIFO_EMPTY_INT_EN BIT(7) > -#define SIRFSOC_SPI_RXFIFO_THD_INT_EN BIT(8) > -#define SIRFSOC_SPI_TXFIFO_THD_INT_EN BIT(9) > -#define SIRFSOC_SPI_FRM_END_INT_EN BIT(10) > - > -/* Interrupt status */ > -#define SIRFSOC_SPI_RX_DONE BIT(0) > -#define SIRFSOC_SPI_TX_DONE BIT(1) > -#define SIRFSOC_SPI_RX_OFLOW BIT(2) > -#define SIRFSOC_SPI_TX_UFLOW BIT(3) > -#define SIRFSOC_SPI_RX_IO_DMA BIT(4) > -#define SIRFSOC_SPI_RX_FIFO_FULL BIT(6) > -#define SIRFSOC_SPI_TXFIFO_EMPTY BIT(7) > -#define SIRFSOC_SPI_RXFIFO_THD_REACH BIT(8) > -#define SIRFSOC_SPI_TXFIFO_THD_REACH BIT(9) > -#define SIRFSOC_SPI_FRM_END BIT(10) > - > -/* TX RX enable */ > -#define SIRFSOC_SPI_RX_EN BIT(0) > -#define SIRFSOC_SPI_TX_EN BIT(1) > -#define SIRFSOC_SPI_CMD_TX_EN BIT(2) > - > -#define SIRFSOC_SPI_IO_MODE_SEL BIT(0) > -#define SIRFSOC_SPI_RX_DMA_FLUSH BIT(2) > - > -/* FIFO OPs */ > -#define SIRFSOC_SPI_FIFO_RESET BIT(0) > -#define SIRFSOC_SPI_FIFO_START BIT(1) > - > -/* FIFO CTRL */ > -#define SIRFSOC_SPI_FIFO_WIDTH_BYTE (0 << 0) > -#define SIRFSOC_SPI_FIFO_WIDTH_WORD (1 << 0) > -#define SIRFSOC_SPI_FIFO_WIDTH_DWORD (2 << 0) > -/* USP related */ > -#define SIRFSOC_USP_SYNC_MODE BIT(0) > -#define SIRFSOC_USP_SLV_MODE BIT(1) > -#define SIRFSOC_USP_LSB BIT(4) > -#define SIRFSOC_USP_EN BIT(5) > -#define SIRFSOC_USP_RXD_FALLING_EDGE BIT(6) > -#define SIRFSOC_USP_TXD_FALLING_EDGE BIT(7) > -#define SIRFSOC_USP_CS_HIGH_VALID BIT(9) > -#define SIRFSOC_USP_SCLK_IDLE_STAT BIT(11) > -#define SIRFSOC_USP_TFS_IO_MODE BIT(14) > -#define SIRFSOC_USP_TFS_IO_INPUT BIT(19) > - > -#define SIRFSOC_USP_RXD_DELAY_LEN_MASK 0xFF > -#define SIRFSOC_USP_TXD_DELAY_LEN_MASK 0xFF > -#define SIRFSOC_USP_RXD_DELAY_OFFSET 0 > -#define SIRFSOC_USP_TXD_DELAY_OFFSET 8 > -#define SIRFSOC_USP_RXD_DELAY_LEN 1 > -#define SIRFSOC_USP_TXD_DELAY_LEN 1 > -#define SIRFSOC_USP_CLK_DIVISOR_OFFSET 21 > -#define SIRFSOC_USP_CLK_DIVISOR_MASK 0x3FF > -#define SIRFSOC_USP_CLK_10_11_MASK 0x3 > -#define SIRFSOC_USP_CLK_10_11_OFFSET 30 > -#define SIRFSOC_USP_CLK_12_15_MASK 0xF > -#define SIRFSOC_USP_CLK_12_15_OFFSET 24 > - > -#define SIRFSOC_USP_TX_DATA_OFFSET 0 > -#define SIRFSOC_USP_TX_SYNC_OFFSET 8 > -#define SIRFSOC_USP_TX_FRAME_OFFSET 16 > -#define SIRFSOC_USP_TX_SHIFTER_OFFSET 24 > - > -#define SIRFSOC_USP_TX_DATA_MASK 0xFF > -#define SIRFSOC_USP_TX_SYNC_MASK 0xFF > -#define SIRFSOC_USP_TX_FRAME_MASK 0xFF > -#define SIRFSOC_USP_TX_SHIFTER_MASK 0x1F > - > -#define SIRFSOC_USP_RX_DATA_OFFSET 0 > -#define SIRFSOC_USP_RX_FRAME_OFFSET 8 > -#define SIRFSOC_USP_RX_SHIFTER_OFFSET 16 > - > -#define SIRFSOC_USP_RX_DATA_MASK 0xFF > -#define SIRFSOC_USP_RX_FRAME_MASK 0xFF > -#define SIRFSOC_USP_RX_SHIFTER_MASK 0x1F > -#define SIRFSOC_USP_CS_HIGH_VALUE BIT(1) > - > -#define SIRFSOC_SPI_FIFO_SC_OFFSET 0 > -#define SIRFSOC_SPI_FIFO_LC_OFFSET 10 > -#define SIRFSOC_SPI_FIFO_HC_OFFSET 20 > - > -#define SIRFSOC_SPI_FIFO_FULL_MASK(s) (1 << ((s)->fifo_full_offset)) > -#define SIRFSOC_SPI_FIFO_EMPTY_MASK(s) (1 << ((s)->fifo_full_offset + 1)) > -#define SIRFSOC_SPI_FIFO_THD_MASK(s) ((s)->fifo_size - 1) > -#define SIRFSOC_SPI_FIFO_THD_OFFSET 2 > -#define SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(s, val) \ > - ((val) & (s)->fifo_level_chk_mask) > - > -enum sirf_spi_type { > - SIRF_REAL_SPI, > - SIRF_USP_SPI_P2, > - SIRF_USP_SPI_A7, > -}; > - > -/* > - * only if the rx/tx buffer and transfer size are 4-bytes aligned, we use dma > - * due to the limitation of dma controller > - */ > - > -#define ALIGNED(x) (!((u32)x & 0x3)) > -#define IS_DMA_VALID(x) (x && ALIGNED(x->tx_buf) && ALIGNED(x->rx_buf) && \ > - ALIGNED(x->len) && (x->len < 2 * PAGE_SIZE)) > - > -#define SIRFSOC_MAX_CMD_BYTES 4 > -#define SIRFSOC_SPI_DEFAULT_FRQ 1000000 > - > -struct sirf_spi_register { > - /*SPI and USP-SPI common*/ > - u32 tx_rx_en; > - u32 int_en; > - u32 int_st; > - u32 tx_dma_io_ctrl; > - u32 tx_dma_io_len; > - u32 txfifo_ctrl; > - u32 txfifo_level_chk; > - u32 txfifo_op; > - u32 txfifo_st; > - u32 txfifo_data; > - u32 rx_dma_io_ctrl; > - u32 rx_dma_io_len; > - u32 rxfifo_ctrl; > - u32 rxfifo_level_chk; > - u32 rxfifo_op; > - u32 rxfifo_st; > - u32 rxfifo_data; > - /*SPI self*/ > - u32 spi_ctrl; > - u32 spi_cmd; > - u32 spi_dummy_delay_ctrl; > - /*USP-SPI self*/ > - u32 usp_mode1; > - u32 usp_mode2; > - u32 usp_tx_frame_ctrl; > - u32 usp_rx_frame_ctrl; > - u32 usp_pin_io_data; > - u32 usp_risc_dsp_mode; > - u32 usp_async_param_reg; > - u32 usp_irda_x_mode_div; > - u32 usp_sm_cfg; > - u32 usp_int_en_clr; > -}; > - > -static const struct sirf_spi_register real_spi_register = { > - .tx_rx_en = 0x8, > - .int_en = 0xc, > - .int_st = 0x10, > - .tx_dma_io_ctrl = 0x100, > - .tx_dma_io_len = 0x104, > - .txfifo_ctrl = 0x108, > - .txfifo_level_chk = 0x10c, > - .txfifo_op = 0x110, > - .txfifo_st = 0x114, > - .txfifo_data = 0x118, > - .rx_dma_io_ctrl = 0x120, > - .rx_dma_io_len = 0x124, > - .rxfifo_ctrl = 0x128, > - .rxfifo_level_chk = 0x12c, > - .rxfifo_op = 0x130, > - .rxfifo_st = 0x134, > - .rxfifo_data = 0x138, > - .spi_ctrl = 0x0, > - .spi_cmd = 0x4, > - .spi_dummy_delay_ctrl = 0x144, > -}; > - > -static const struct sirf_spi_register usp_spi_register = { > - .tx_rx_en = 0x10, > - .int_en = 0x14, > - .int_st = 0x18, > - .tx_dma_io_ctrl = 0x100, > - .tx_dma_io_len = 0x104, > - .txfifo_ctrl = 0x108, > - .txfifo_level_chk = 0x10c, > - .txfifo_op = 0x110, > - .txfifo_st = 0x114, > - .txfifo_data = 0x118, > - .rx_dma_io_ctrl = 0x120, > - .rx_dma_io_len = 0x124, > - .rxfifo_ctrl = 0x128, > - .rxfifo_level_chk = 0x12c, > - .rxfifo_op = 0x130, > - .rxfifo_st = 0x134, > - .rxfifo_data = 0x138, > - .usp_mode1 = 0x0, > - .usp_mode2 = 0x4, > - .usp_tx_frame_ctrl = 0x8, > - .usp_rx_frame_ctrl = 0xc, > - .usp_pin_io_data = 0x1c, > - .usp_risc_dsp_mode = 0x20, > - .usp_async_param_reg = 0x24, > - .usp_irda_x_mode_div = 0x28, > - .usp_sm_cfg = 0x2c, > - .usp_int_en_clr = 0x140, > -}; > - > -struct sirfsoc_spi { > - struct spi_bitbang bitbang; > - struct completion rx_done; > - struct completion tx_done; > - > - void __iomem *base; > - u32 ctrl_freq; /* SPI controller clock speed */ > - struct clk *clk; > - > - /* rx & tx bufs from the spi_transfer */ > - const void *tx; > - void *rx; > - > - /* place received word into rx buffer */ > - void (*rx_word) (struct sirfsoc_spi *); > - /* get word from tx buffer for sending */ > - void (*tx_word) (struct sirfsoc_spi *); > - > - /* number of words left to be tranmitted/received */ > - unsigned int left_tx_word; > - unsigned int left_rx_word; > - > - /* rx & tx DMA channels */ > - struct dma_chan *rx_chan; > - struct dma_chan *tx_chan; > - dma_addr_t src_start; > - dma_addr_t dst_start; > - int word_width; /* in bytes */ > - > - /* > - * if tx size is not more than 4 and rx size is NULL, use > - * command model > - */ > - bool tx_by_cmd; > - bool hw_cs; > - enum sirf_spi_type type; > - const struct sirf_spi_register *regs; > - unsigned int fifo_size; > - /* fifo empty offset is (fifo full offset + 1)*/ > - unsigned int fifo_full_offset; > - /* fifo_level_chk_mask is (fifo_size/4 - 1) */ > - unsigned int fifo_level_chk_mask; > - unsigned int dat_max_frm_len; > -}; > - > -struct sirf_spi_comp_data { > - const struct sirf_spi_register *regs; > - enum sirf_spi_type type; > - unsigned int dat_max_frm_len; > - unsigned int fifo_size; > - void (*hwinit)(struct sirfsoc_spi *sspi); > -}; > - > -static void sirfsoc_usp_hwinit(struct sirfsoc_spi *sspi) > -{ > - /* reset USP and let USP can operate */ > - writel(readl(sspi->base + sspi->regs->usp_mode1) & > - ~SIRFSOC_USP_EN, sspi->base + sspi->regs->usp_mode1); > - writel(readl(sspi->base + sspi->regs->usp_mode1) | > - SIRFSOC_USP_EN, sspi->base + sspi->regs->usp_mode1); > -} > - > -static void spi_sirfsoc_rx_word_u8(struct sirfsoc_spi *sspi) > -{ > - u32 data; > - u8 *rx = sspi->rx; > - > - data = readl(sspi->base + sspi->regs->rxfifo_data); > - > - if (rx) { > - *rx++ = (u8) data; > - sspi->rx = rx; > - } > - > - sspi->left_rx_word--; > -} > - > -static void spi_sirfsoc_tx_word_u8(struct sirfsoc_spi *sspi) > -{ > - u32 data = 0; > - const u8 *tx = sspi->tx; > - > - if (tx) { > - data = *tx++; > - sspi->tx = tx; > - } > - writel(data, sspi->base + sspi->regs->txfifo_data); > - sspi->left_tx_word--; > -} > - > -static void spi_sirfsoc_rx_word_u16(struct sirfsoc_spi *sspi) > -{ > - u32 data; > - u16 *rx = sspi->rx; > - > - data = readl(sspi->base + sspi->regs->rxfifo_data); > - > - if (rx) { > - *rx++ = (u16) data; > - sspi->rx = rx; > - } > - > - sspi->left_rx_word--; > -} > - > -static void spi_sirfsoc_tx_word_u16(struct sirfsoc_spi *sspi) > -{ > - u32 data = 0; > - const u16 *tx = sspi->tx; > - > - if (tx) { > - data = *tx++; > - sspi->tx = tx; > - } > - > - writel(data, sspi->base + sspi->regs->txfifo_data); > - sspi->left_tx_word--; > -} > - > -static void spi_sirfsoc_rx_word_u32(struct sirfsoc_spi *sspi) > -{ > - u32 data; > - u32 *rx = sspi->rx; > - > - data = readl(sspi->base + sspi->regs->rxfifo_data); > - > - if (rx) { > - *rx++ = (u32) data; > - sspi->rx = rx; > - } > - > - sspi->left_rx_word--; > - > -} > - > -static void spi_sirfsoc_tx_word_u32(struct sirfsoc_spi *sspi) > -{ > - u32 data = 0; > - const u32 *tx = sspi->tx; > - > - if (tx) { > - data = *tx++; > - sspi->tx = tx; > - } > - > - writel(data, sspi->base + sspi->regs->txfifo_data); > - sspi->left_tx_word--; > -} > - > -static irqreturn_t spi_sirfsoc_irq(int irq, void *dev_id) > -{ > - struct sirfsoc_spi *sspi = dev_id; > - u32 spi_stat; > - > - spi_stat = readl(sspi->base + sspi->regs->int_st); > - if (sspi->tx_by_cmd && sspi->type == SIRF_REAL_SPI > - && (spi_stat & SIRFSOC_SPI_FRM_END)) { > - complete(&sspi->tx_done); > - writel(0x0, sspi->base + sspi->regs->int_en); > - writel(readl(sspi->base + sspi->regs->int_st), > - sspi->base + sspi->regs->int_st); > - return IRQ_HANDLED; > - } > - /* Error Conditions */ > - if (spi_stat & SIRFSOC_SPI_RX_OFLOW || > - spi_stat & SIRFSOC_SPI_TX_UFLOW) { > - complete(&sspi->tx_done); > - complete(&sspi->rx_done); > - switch (sspi->type) { > - case SIRF_REAL_SPI: > - case SIRF_USP_SPI_P2: > - writel(0x0, sspi->base + sspi->regs->int_en); > - break; > - case SIRF_USP_SPI_A7: > - writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr); > - break; > - } > - writel(readl(sspi->base + sspi->regs->int_st), > - sspi->base + sspi->regs->int_st); > - return IRQ_HANDLED; > - } > - if (spi_stat & SIRFSOC_SPI_TXFIFO_EMPTY) > - complete(&sspi->tx_done); > - while (!(readl(sspi->base + sspi->regs->int_st) & > - SIRFSOC_SPI_RX_IO_DMA)) > - cpu_relax(); > - complete(&sspi->rx_done); > - switch (sspi->type) { > - case SIRF_REAL_SPI: > - case SIRF_USP_SPI_P2: > - writel(0x0, sspi->base + sspi->regs->int_en); > - break; > - case SIRF_USP_SPI_A7: > - writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr); > - break; > - } > - writel(readl(sspi->base + sspi->regs->int_st), > - sspi->base + sspi->regs->int_st); > - > - return IRQ_HANDLED; > -} > - > -static void spi_sirfsoc_dma_fini_callback(void *data) > -{ > - struct completion *dma_complete = data; > - > - complete(dma_complete); > -} > - > -static void spi_sirfsoc_cmd_transfer(struct spi_device *spi, > - struct spi_transfer *t) > -{ > - struct sirfsoc_spi *sspi; > - int timeout = t->len * 10; > - u32 cmd; > - > - sspi = spi_master_get_devdata(spi->master); > - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->txfifo_op); > - writel(SIRFSOC_SPI_FIFO_START, sspi->base + sspi->regs->txfifo_op); > - memcpy(&cmd, sspi->tx, t->len); > - if (sspi->word_width == 1 && !(spi->mode & SPI_LSB_FIRST)) > - cmd = cpu_to_be32(cmd) >> > - ((SIRFSOC_MAX_CMD_BYTES - t->len) * 8); > - if (sspi->word_width == 2 && t->len == 4 && > - (!(spi->mode & SPI_LSB_FIRST))) > - cmd = ((cmd & 0xffff) << 16) | (cmd >> 16); > - writel(cmd, sspi->base + sspi->regs->spi_cmd); > - writel(SIRFSOC_SPI_FRM_END_INT_EN, > - sspi->base + sspi->regs->int_en); > - writel(SIRFSOC_SPI_CMD_TX_EN, > - sspi->base + sspi->regs->tx_rx_en); > - if (wait_for_completion_timeout(&sspi->tx_done, timeout) == 0) { > - dev_err(&spi->dev, "cmd transfer timeout\n"); > - return; > - } > - sspi->left_rx_word -= t->len; > -} > - > -static void spi_sirfsoc_dma_transfer(struct spi_device *spi, > - struct spi_transfer *t) > -{ > - struct sirfsoc_spi *sspi; > - struct dma_async_tx_descriptor *rx_desc, *tx_desc; > - int timeout = t->len * 10; > - > - sspi = spi_master_get_devdata(spi->master); > - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->rxfifo_op); > - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->txfifo_op); > - switch (sspi->type) { > - case SIRF_REAL_SPI: > - writel(SIRFSOC_SPI_FIFO_START, > - sspi->base + sspi->regs->rxfifo_op); > - writel(SIRFSOC_SPI_FIFO_START, > - sspi->base + sspi->regs->txfifo_op); > - writel(0, sspi->base + sspi->regs->int_en); > - break; > - case SIRF_USP_SPI_P2: > - writel(0x0, sspi->base + sspi->regs->rxfifo_op); > - writel(0x0, sspi->base + sspi->regs->txfifo_op); > - writel(0, sspi->base + sspi->regs->int_en); > - break; > - case SIRF_USP_SPI_A7: > - writel(0x0, sspi->base + sspi->regs->rxfifo_op); > - writel(0x0, sspi->base + sspi->regs->txfifo_op); > - writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr); > - break; > - } > - writel(readl(sspi->base + sspi->regs->int_st), > - sspi->base + sspi->regs->int_st); > - if (sspi->left_tx_word < sspi->dat_max_frm_len) { > - switch (sspi->type) { > - case SIRF_REAL_SPI: > - writel(readl(sspi->base + sspi->regs->spi_ctrl) | > - SIRFSOC_SPI_ENA_AUTO_CLR | > - SIRFSOC_SPI_MUL_DAT_MODE, > - sspi->base + sspi->regs->spi_ctrl); > - writel(sspi->left_tx_word - 1, > - sspi->base + sspi->regs->tx_dma_io_len); > - writel(sspi->left_tx_word - 1, > - sspi->base + sspi->regs->rx_dma_io_len); > - break; > - case SIRF_USP_SPI_P2: > - case SIRF_USP_SPI_A7: > - /*USP simulate SPI, tx/rx_dma_io_len indicates bytes*/ > - writel(sspi->left_tx_word * sspi->word_width, > - sspi->base + sspi->regs->tx_dma_io_len); > - writel(sspi->left_tx_word * sspi->word_width, > - sspi->base + sspi->regs->rx_dma_io_len); > - break; > - } > - } else { > - if (sspi->type == SIRF_REAL_SPI) > - writel(readl(sspi->base + sspi->regs->spi_ctrl), > - sspi->base + sspi->regs->spi_ctrl); > - writel(0, sspi->base + sspi->regs->tx_dma_io_len); > - writel(0, sspi->base + sspi->regs->rx_dma_io_len); > - } > - sspi->dst_start = dma_map_single(&spi->dev, sspi->rx, t->len, > - (t->tx_buf != t->rx_buf) ? > - DMA_FROM_DEVICE : DMA_BIDIRECTIONAL); > - rx_desc = dmaengine_prep_slave_single(sspi->rx_chan, > - sspi->dst_start, t->len, DMA_DEV_TO_MEM, > - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); > - rx_desc->callback = spi_sirfsoc_dma_fini_callback; > - rx_desc->callback_param = &sspi->rx_done; > - > - sspi->src_start = dma_map_single(&spi->dev, (void *)sspi->tx, t->len, > - (t->tx_buf != t->rx_buf) ? > - DMA_TO_DEVICE : DMA_BIDIRECTIONAL); > - tx_desc = dmaengine_prep_slave_single(sspi->tx_chan, > - sspi->src_start, t->len, DMA_MEM_TO_DEV, > - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); > - tx_desc->callback = spi_sirfsoc_dma_fini_callback; > - tx_desc->callback_param = &sspi->tx_done; > - > - dmaengine_submit(tx_desc); > - dmaengine_submit(rx_desc); > - dma_async_issue_pending(sspi->tx_chan); > - dma_async_issue_pending(sspi->rx_chan); > - writel(SIRFSOC_SPI_RX_EN | SIRFSOC_SPI_TX_EN, > - sspi->base + sspi->regs->tx_rx_en); > - if (sspi->type == SIRF_USP_SPI_P2 || > - sspi->type == SIRF_USP_SPI_A7) { > - writel(SIRFSOC_SPI_FIFO_START, > - sspi->base + sspi->regs->rxfifo_op); > - writel(SIRFSOC_SPI_FIFO_START, > - sspi->base + sspi->regs->txfifo_op); > - } > - if (wait_for_completion_timeout(&sspi->rx_done, timeout) == 0) { > - dev_err(&spi->dev, "transfer timeout\n"); > - dmaengine_terminate_all(sspi->rx_chan); > - } else > - sspi->left_rx_word = 0; > - /* > - * we only wait tx-done event if transferring by DMA. for PIO, > - * we get rx data by writing tx data, so if rx is done, tx has > - * done earlier > - */ > - if (wait_for_completion_timeout(&sspi->tx_done, timeout) == 0) { > - dev_err(&spi->dev, "transfer timeout\n"); > - if (sspi->type == SIRF_USP_SPI_P2 || > - sspi->type == SIRF_USP_SPI_A7) > - writel(0, sspi->base + sspi->regs->tx_rx_en); > - dmaengine_terminate_all(sspi->tx_chan); > - } > - dma_unmap_single(&spi->dev, sspi->src_start, t->len, DMA_TO_DEVICE); > - dma_unmap_single(&spi->dev, sspi->dst_start, t->len, DMA_FROM_DEVICE); > - /* TX, RX FIFO stop */ > - writel(0, sspi->base + sspi->regs->rxfifo_op); > - writel(0, sspi->base + sspi->regs->txfifo_op); > - if (sspi->left_tx_word >= sspi->dat_max_frm_len) > - writel(0, sspi->base + sspi->regs->tx_rx_en); > - if (sspi->type == SIRF_USP_SPI_P2 || > - sspi->type == SIRF_USP_SPI_A7) > - writel(0, sspi->base + sspi->regs->tx_rx_en); > -} > - > -static void spi_sirfsoc_pio_transfer(struct spi_device *spi, > - struct spi_transfer *t) > -{ > - struct sirfsoc_spi *sspi; > - int timeout = t->len * 10; > - unsigned int data_units; > - > - sspi = spi_master_get_devdata(spi->master); > - do { > - writel(SIRFSOC_SPI_FIFO_RESET, > - sspi->base + sspi->regs->rxfifo_op); > - writel(SIRFSOC_SPI_FIFO_RESET, > - sspi->base + sspi->regs->txfifo_op); > - switch (sspi->type) { > - case SIRF_USP_SPI_P2: > - writel(0x0, sspi->base + sspi->regs->rxfifo_op); > - writel(0x0, sspi->base + sspi->regs->txfifo_op); > - writel(0, sspi->base + sspi->regs->int_en); > - writel(readl(sspi->base + sspi->regs->int_st), > - sspi->base + sspi->regs->int_st); > - writel(min((sspi->left_tx_word * sspi->word_width), > - sspi->fifo_size), > - sspi->base + sspi->regs->tx_dma_io_len); > - writel(min((sspi->left_rx_word * sspi->word_width), > - sspi->fifo_size), > - sspi->base + sspi->regs->rx_dma_io_len); > - break; > - case SIRF_USP_SPI_A7: > - writel(0x0, sspi->base + sspi->regs->rxfifo_op); > - writel(0x0, sspi->base + sspi->regs->txfifo_op); > - writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr); > - writel(readl(sspi->base + sspi->regs->int_st), > - sspi->base + sspi->regs->int_st); > - writel(min((sspi->left_tx_word * sspi->word_width), > - sspi->fifo_size), > - sspi->base + sspi->regs->tx_dma_io_len); > - writel(min((sspi->left_rx_word * sspi->word_width), > - sspi->fifo_size), > - sspi->base + sspi->regs->rx_dma_io_len); > - break; > - case SIRF_REAL_SPI: > - writel(SIRFSOC_SPI_FIFO_START, > - sspi->base + sspi->regs->rxfifo_op); > - writel(SIRFSOC_SPI_FIFO_START, > - sspi->base + sspi->regs->txfifo_op); > - writel(0, sspi->base + sspi->regs->int_en); > - writel(readl(sspi->base + sspi->regs->int_st), > - sspi->base + sspi->regs->int_st); > - writel(readl(sspi->base + sspi->regs->spi_ctrl) | > - SIRFSOC_SPI_MUL_DAT_MODE | > - SIRFSOC_SPI_ENA_AUTO_CLR, > - sspi->base + sspi->regs->spi_ctrl); > - data_units = sspi->fifo_size / sspi->word_width; > - writel(min(sspi->left_tx_word, data_units) - 1, > - sspi->base + sspi->regs->tx_dma_io_len); > - writel(min(sspi->left_rx_word, data_units) - 1, > - sspi->base + sspi->regs->rx_dma_io_len); > - break; > - } > - while (!((readl(sspi->base + sspi->regs->txfifo_st) > - & SIRFSOC_SPI_FIFO_FULL_MASK(sspi))) && > - sspi->left_tx_word) > - sspi->tx_word(sspi); > - writel(SIRFSOC_SPI_TXFIFO_EMPTY_INT_EN | > - SIRFSOC_SPI_TX_UFLOW_INT_EN | > - SIRFSOC_SPI_RX_OFLOW_INT_EN | > - SIRFSOC_SPI_RX_IO_DMA_INT_EN, > - sspi->base + sspi->regs->int_en); > - writel(SIRFSOC_SPI_RX_EN | SIRFSOC_SPI_TX_EN, > - sspi->base + sspi->regs->tx_rx_en); > - if (sspi->type == SIRF_USP_SPI_P2 || > - sspi->type == SIRF_USP_SPI_A7) { > - writel(SIRFSOC_SPI_FIFO_START, > - sspi->base + sspi->regs->rxfifo_op); > - writel(SIRFSOC_SPI_FIFO_START, > - sspi->base + sspi->regs->txfifo_op); > - } > - if (!wait_for_completion_timeout(&sspi->tx_done, timeout) || > - !wait_for_completion_timeout(&sspi->rx_done, timeout)) { > - dev_err(&spi->dev, "transfer timeout\n"); > - if (sspi->type == SIRF_USP_SPI_P2 || > - sspi->type == SIRF_USP_SPI_A7) > - writel(0, sspi->base + sspi->regs->tx_rx_en); > - break; > - } > - while (!((readl(sspi->base + sspi->regs->rxfifo_st) > - & SIRFSOC_SPI_FIFO_EMPTY_MASK(sspi))) && > - sspi->left_rx_word) > - sspi->rx_word(sspi); > - if (sspi->type == SIRF_USP_SPI_P2 || > - sspi->type == SIRF_USP_SPI_A7) > - writel(0, sspi->base + sspi->regs->tx_rx_en); > - writel(0, sspi->base + sspi->regs->rxfifo_op); > - writel(0, sspi->base + sspi->regs->txfifo_op); > - } while (sspi->left_tx_word != 0 || sspi->left_rx_word != 0); > -} > - > -static int spi_sirfsoc_transfer(struct spi_device *spi, struct spi_transfer *t) > -{ > - struct sirfsoc_spi *sspi; > - > - sspi = spi_master_get_devdata(spi->master); > - sspi->tx = t->tx_buf; > - sspi->rx = t->rx_buf; > - sspi->left_tx_word = sspi->left_rx_word = t->len / sspi->word_width; > - reinit_completion(&sspi->rx_done); > - reinit_completion(&sspi->tx_done); > - /* > - * in the transfer, if transfer data using command register with rx_buf > - * null, just fill command data into command register and wait for its > - * completion. > - */ > - if (sspi->type == SIRF_REAL_SPI && sspi->tx_by_cmd) > - spi_sirfsoc_cmd_transfer(spi, t); > - else if (IS_DMA_VALID(t)) > - spi_sirfsoc_dma_transfer(spi, t); > - else > - spi_sirfsoc_pio_transfer(spi, t); > - > - return t->len - sspi->left_rx_word * sspi->word_width; > -} > - > -static void spi_sirfsoc_chipselect(struct spi_device *spi, int value) > -{ > - struct sirfsoc_spi *sspi = spi_master_get_devdata(spi->master); > - > - if (sspi->hw_cs) { > - u32 regval; > - > - switch (sspi->type) { > - case SIRF_REAL_SPI: > - regval = readl(sspi->base + sspi->regs->spi_ctrl); > - switch (value) { > - case BITBANG_CS_ACTIVE: > - if (spi->mode & SPI_CS_HIGH) > - regval |= SIRFSOC_SPI_CS_IO_OUT; > - else > - regval &= ~SIRFSOC_SPI_CS_IO_OUT; > - break; > - case BITBANG_CS_INACTIVE: > - if (spi->mode & SPI_CS_HIGH) > - regval &= ~SIRFSOC_SPI_CS_IO_OUT; > - else > - regval |= SIRFSOC_SPI_CS_IO_OUT; > - break; > - } > - writel(regval, sspi->base + sspi->regs->spi_ctrl); > - break; > - case SIRF_USP_SPI_P2: > - case SIRF_USP_SPI_A7: > - regval = readl(sspi->base + > - sspi->regs->usp_pin_io_data); > - switch (value) { > - case BITBANG_CS_ACTIVE: > - if (spi->mode & SPI_CS_HIGH) > - regval |= SIRFSOC_USP_CS_HIGH_VALUE; > - else > - regval &= ~(SIRFSOC_USP_CS_HIGH_VALUE); > - break; > - case BITBANG_CS_INACTIVE: > - if (spi->mode & SPI_CS_HIGH) > - regval &= ~(SIRFSOC_USP_CS_HIGH_VALUE); > - else > - regval |= SIRFSOC_USP_CS_HIGH_VALUE; > - break; > - } > - writel(regval, > - sspi->base + sspi->regs->usp_pin_io_data); > - break; > - } > - } else { > - switch (value) { > - case BITBANG_CS_ACTIVE: > - gpio_direction_output(spi->cs_gpio, > - spi->mode & SPI_CS_HIGH ? 1 : 0); > - break; > - case BITBANG_CS_INACTIVE: > - gpio_direction_output(spi->cs_gpio, > - spi->mode & SPI_CS_HIGH ? 0 : 1); > - break; > - } > - } > -} > - > -static int spi_sirfsoc_config_mode(struct spi_device *spi) > -{ > - struct sirfsoc_spi *sspi; > - u32 regval, usp_mode1; > - > - sspi = spi_master_get_devdata(spi->master); > - regval = readl(sspi->base + sspi->regs->spi_ctrl); > - usp_mode1 = readl(sspi->base + sspi->regs->usp_mode1); > - if (!(spi->mode & SPI_CS_HIGH)) { > - regval |= SIRFSOC_SPI_CS_IDLE_STAT; > - usp_mode1 &= ~SIRFSOC_USP_CS_HIGH_VALID; > - } else { > - regval &= ~SIRFSOC_SPI_CS_IDLE_STAT; > - usp_mode1 |= SIRFSOC_USP_CS_HIGH_VALID; > - } > - if (!(spi->mode & SPI_LSB_FIRST)) { > - regval |= SIRFSOC_SPI_TRAN_MSB; > - usp_mode1 &= ~SIRFSOC_USP_LSB; > - } else { > - regval &= ~SIRFSOC_SPI_TRAN_MSB; > - usp_mode1 |= SIRFSOC_USP_LSB; > - } > - if (spi->mode & SPI_CPOL) { > - regval |= SIRFSOC_SPI_CLK_IDLE_STAT; > - usp_mode1 |= SIRFSOC_USP_SCLK_IDLE_STAT; > - } else { > - regval &= ~SIRFSOC_SPI_CLK_IDLE_STAT; > - usp_mode1 &= ~SIRFSOC_USP_SCLK_IDLE_STAT; > - } > - /* > - * Data should be driven at least 1/2 cycle before the fetch edge > - * to make sure that data gets stable at the fetch edge. > - */ > - if (((spi->mode & SPI_CPOL) && (spi->mode & SPI_CPHA)) || > - (!(spi->mode & SPI_CPOL) && !(spi->mode & SPI_CPHA))) { > - regval &= ~SIRFSOC_SPI_DRV_POS_EDGE; > - usp_mode1 |= (SIRFSOC_USP_TXD_FALLING_EDGE | > - SIRFSOC_USP_RXD_FALLING_EDGE); > - } else { > - regval |= SIRFSOC_SPI_DRV_POS_EDGE; > - usp_mode1 &= ~(SIRFSOC_USP_RXD_FALLING_EDGE | > - SIRFSOC_USP_TXD_FALLING_EDGE); > - } > - writel((SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size - 2) << > - SIRFSOC_SPI_FIFO_SC_OFFSET) | > - (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size / 2) << > - SIRFSOC_SPI_FIFO_LC_OFFSET) | > - (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, 2) << > - SIRFSOC_SPI_FIFO_HC_OFFSET), > - sspi->base + sspi->regs->txfifo_level_chk); > - writel((SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, 2) << > - SIRFSOC_SPI_FIFO_SC_OFFSET) | > - (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size / 2) << > - SIRFSOC_SPI_FIFO_LC_OFFSET) | > - (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size - 2) << > - SIRFSOC_SPI_FIFO_HC_OFFSET), > - sspi->base + sspi->regs->rxfifo_level_chk); > - /* > - * it should never set to hardware cs mode because in hardware cs mode, > - * cs signal can't controlled by driver. > - */ > - switch (sspi->type) { > - case SIRF_REAL_SPI: > - regval |= SIRFSOC_SPI_CS_IO_MODE; > - writel(regval, sspi->base + sspi->regs->spi_ctrl); > - break; > - case SIRF_USP_SPI_P2: > - case SIRF_USP_SPI_A7: > - usp_mode1 |= SIRFSOC_USP_SYNC_MODE; > - usp_mode1 |= SIRFSOC_USP_TFS_IO_MODE; > - usp_mode1 &= ~SIRFSOC_USP_TFS_IO_INPUT; > - writel(usp_mode1, sspi->base + sspi->regs->usp_mode1); > - break; > - } > - > - return 0; > -} > - > -static int > -spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t) > -{ > - struct sirfsoc_spi *sspi; > - u8 bits_per_word = 0; > - int hz = 0; > - u32 regval, txfifo_ctrl, rxfifo_ctrl, tx_frm_ctl, rx_frm_ctl, usp_mode2; > - > - sspi = spi_master_get_devdata(spi->master); > - > - bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word; > - hz = t && t->speed_hz ? t->speed_hz : spi->max_speed_hz; > - > - usp_mode2 = regval = (sspi->ctrl_freq / (2 * hz)) - 1; > - if (regval > 0xFFFF || regval < 0) { > - dev_err(&spi->dev, "Speed %d not supported\n", hz); > - return -EINVAL; > - } > - switch (bits_per_word) { > - case 8: > - regval |= SIRFSOC_SPI_TRAN_DAT_FORMAT_8; > - sspi->rx_word = spi_sirfsoc_rx_word_u8; > - sspi->tx_word = spi_sirfsoc_tx_word_u8; > - break; > - case 12: > - case 16: > - regval |= (bits_per_word == 12) ? > - SIRFSOC_SPI_TRAN_DAT_FORMAT_12 : > - SIRFSOC_SPI_TRAN_DAT_FORMAT_16; > - sspi->rx_word = spi_sirfsoc_rx_word_u16; > - sspi->tx_word = spi_sirfsoc_tx_word_u16; > - break; > - case 32: > - regval |= SIRFSOC_SPI_TRAN_DAT_FORMAT_32; > - sspi->rx_word = spi_sirfsoc_rx_word_u32; > - sspi->tx_word = spi_sirfsoc_tx_word_u32; > - break; > - default: > - dev_err(&spi->dev, "bpw %d not supported\n", bits_per_word); > - return -EINVAL; > - } > - sspi->word_width = DIV_ROUND_UP(bits_per_word, 8); > - txfifo_ctrl = (((sspi->fifo_size / 2) & > - SIRFSOC_SPI_FIFO_THD_MASK(sspi)) > - << SIRFSOC_SPI_FIFO_THD_OFFSET) | > - (sspi->word_width >> 1); > - rxfifo_ctrl = (((sspi->fifo_size / 2) & > - SIRFSOC_SPI_FIFO_THD_MASK(sspi)) > - << SIRFSOC_SPI_FIFO_THD_OFFSET) | > - (sspi->word_width >> 1); > - writel(txfifo_ctrl, sspi->base + sspi->regs->txfifo_ctrl); > - writel(rxfifo_ctrl, sspi->base + sspi->regs->rxfifo_ctrl); > - if (sspi->type == SIRF_USP_SPI_P2 || > - sspi->type == SIRF_USP_SPI_A7) { > - tx_frm_ctl = 0; > - tx_frm_ctl |= ((bits_per_word - 1) & SIRFSOC_USP_TX_DATA_MASK) > - << SIRFSOC_USP_TX_DATA_OFFSET; > - tx_frm_ctl |= ((bits_per_word + 1 + SIRFSOC_USP_TXD_DELAY_LEN > - - 1) & SIRFSOC_USP_TX_SYNC_MASK) << > - SIRFSOC_USP_TX_SYNC_OFFSET; > - tx_frm_ctl |= ((bits_per_word + 1 + SIRFSOC_USP_TXD_DELAY_LEN > - + 2 - 1) & SIRFSOC_USP_TX_FRAME_MASK) << > - SIRFSOC_USP_TX_FRAME_OFFSET; > - tx_frm_ctl |= ((bits_per_word - 1) & > - SIRFSOC_USP_TX_SHIFTER_MASK) << > - SIRFSOC_USP_TX_SHIFTER_OFFSET; > - rx_frm_ctl = 0; > - rx_frm_ctl |= ((bits_per_word - 1) & SIRFSOC_USP_RX_DATA_MASK) > - << SIRFSOC_USP_RX_DATA_OFFSET; > - rx_frm_ctl |= ((bits_per_word + 1 + SIRFSOC_USP_RXD_DELAY_LEN > - + 2 - 1) & SIRFSOC_USP_RX_FRAME_MASK) << > - SIRFSOC_USP_RX_FRAME_OFFSET; > - rx_frm_ctl |= ((bits_per_word - 1) > - & SIRFSOC_USP_RX_SHIFTER_MASK) << > - SIRFSOC_USP_RX_SHIFTER_OFFSET; > - writel(tx_frm_ctl | (((usp_mode2 >> 10) & > - SIRFSOC_USP_CLK_10_11_MASK) << > - SIRFSOC_USP_CLK_10_11_OFFSET), > - sspi->base + sspi->regs->usp_tx_frame_ctrl); > - writel(rx_frm_ctl | (((usp_mode2 >> 12) & > - SIRFSOC_USP_CLK_12_15_MASK) << > - SIRFSOC_USP_CLK_12_15_OFFSET), > - sspi->base + sspi->regs->usp_rx_frame_ctrl); > - writel(readl(sspi->base + sspi->regs->usp_mode2) | > - ((usp_mode2 & SIRFSOC_USP_CLK_DIVISOR_MASK) << > - SIRFSOC_USP_CLK_DIVISOR_OFFSET) | > - (SIRFSOC_USP_RXD_DELAY_LEN << > - SIRFSOC_USP_RXD_DELAY_OFFSET) | > - (SIRFSOC_USP_TXD_DELAY_LEN << > - SIRFSOC_USP_TXD_DELAY_OFFSET), > - sspi->base + sspi->regs->usp_mode2); > - } > - if (sspi->type == SIRF_REAL_SPI) > - writel(regval, sspi->base + sspi->regs->spi_ctrl); > - spi_sirfsoc_config_mode(spi); > - if (sspi->type == SIRF_REAL_SPI) { > - if (t && t->tx_buf && !t->rx_buf && > - (t->len <= SIRFSOC_MAX_CMD_BYTES)) { > - sspi->tx_by_cmd = true; > - writel(readl(sspi->base + sspi->regs->spi_ctrl) | > - (SIRFSOC_SPI_CMD_BYTE_NUM((t->len - 1)) | > - SIRFSOC_SPI_CMD_MODE), > - sspi->base + sspi->regs->spi_ctrl); > - } else { > - sspi->tx_by_cmd = false; > - writel(readl(sspi->base + sspi->regs->spi_ctrl) & > - ~SIRFSOC_SPI_CMD_MODE, > - sspi->base + sspi->regs->spi_ctrl); > - } > - } > - if (IS_DMA_VALID(t)) { > - /* Enable DMA mode for RX, TX */ > - writel(0, sspi->base + sspi->regs->tx_dma_io_ctrl); > - writel(SIRFSOC_SPI_RX_DMA_FLUSH, > - sspi->base + sspi->regs->rx_dma_io_ctrl); > - } else { > - /* Enable IO mode for RX, TX */ > - writel(SIRFSOC_SPI_IO_MODE_SEL, > - sspi->base + sspi->regs->tx_dma_io_ctrl); > - writel(SIRFSOC_SPI_IO_MODE_SEL, > - sspi->base + sspi->regs->rx_dma_io_ctrl); > - } > - return 0; > -} > - > -static int spi_sirfsoc_setup(struct spi_device *spi) > -{ > - struct sirfsoc_spi *sspi; > - int ret = 0; > - > - sspi = spi_master_get_devdata(spi->master); > - if (spi->cs_gpio == -ENOENT) > - sspi->hw_cs = true; > - else { > - sspi->hw_cs = false; > - if (!spi_get_ctldata(spi)) { > - void *cs = kmalloc(sizeof(int), GFP_KERNEL); > - if (!cs) { > - ret = -ENOMEM; > - goto exit; > - } > - ret = gpio_is_valid(spi->cs_gpio); > - if (!ret) { > - dev_err(&spi->dev, "no valid gpio\n"); > - ret = -ENOENT; > - goto exit; > - } > - ret = gpio_request(spi->cs_gpio, DRIVER_NAME); > - if (ret) { > - dev_err(&spi->dev, "failed to request gpio\n"); > - goto exit; > - } > - spi_set_ctldata(spi, cs); > - } > - } > - spi_sirfsoc_config_mode(spi); > - spi_sirfsoc_chipselect(spi, BITBANG_CS_INACTIVE); > -exit: > - return ret; > -} > - > -static void spi_sirfsoc_cleanup(struct spi_device *spi) > -{ > - if (spi_get_ctldata(spi)) { > - gpio_free(spi->cs_gpio); > - kfree(spi_get_ctldata(spi)); > - } > -} > - > -static const struct sirf_spi_comp_data sirf_real_spi = { > - .regs = &real_spi_register, > - .type = SIRF_REAL_SPI, > - .dat_max_frm_len = 64 * 1024, > - .fifo_size = 256, > -}; > - > -static const struct sirf_spi_comp_data sirf_usp_spi_p2 = { > - .regs = &usp_spi_register, > - .type = SIRF_USP_SPI_P2, > - .dat_max_frm_len = 1024 * 1024, > - .fifo_size = 128, > - .hwinit = sirfsoc_usp_hwinit, > -}; > - > -static const struct sirf_spi_comp_data sirf_usp_spi_a7 = { > - .regs = &usp_spi_register, > - .type = SIRF_USP_SPI_A7, > - .dat_max_frm_len = 1024 * 1024, > - .fifo_size = 512, > - .hwinit = sirfsoc_usp_hwinit, > -}; > - > -static const struct of_device_id spi_sirfsoc_of_match[] = { > - { .compatible = "sirf,prima2-spi", .data = &sirf_real_spi}, > - { .compatible = "sirf,prima2-usp-spi", .data = &sirf_usp_spi_p2}, > - { .compatible = "sirf,atlas7-usp-spi", .data = &sirf_usp_spi_a7}, > - {} > -}; > -MODULE_DEVICE_TABLE(of, spi_sirfsoc_of_match); > - > -static int spi_sirfsoc_probe(struct platform_device *pdev) > -{ > - struct sirfsoc_spi *sspi; > - struct spi_master *master; > - const struct sirf_spi_comp_data *spi_comp_data; > - int irq; > - int ret; > - const struct of_device_id *match; > - > - ret = device_reset(&pdev->dev); > - if (ret) { > - dev_err(&pdev->dev, "SPI reset failed!\n"); > - return ret; > - } > - > - master = spi_alloc_master(&pdev->dev, sizeof(*sspi)); > - if (!master) { > - dev_err(&pdev->dev, "Unable to allocate SPI master\n"); > - return -ENOMEM; > - } > - match = of_match_node(spi_sirfsoc_of_match, pdev->dev.of_node); > - platform_set_drvdata(pdev, master); > - sspi = spi_master_get_devdata(master); > - sspi->fifo_full_offset = ilog2(sspi->fifo_size); > - spi_comp_data = match->data; > - sspi->regs = spi_comp_data->regs; > - sspi->type = spi_comp_data->type; > - sspi->fifo_level_chk_mask = (sspi->fifo_size / 4) - 1; > - sspi->dat_max_frm_len = spi_comp_data->dat_max_frm_len; > - sspi->fifo_size = spi_comp_data->fifo_size; > - sspi->base = devm_platform_ioremap_resource(pdev, 0); > - if (IS_ERR(sspi->base)) { > - ret = PTR_ERR(sspi->base); > - goto free_master; > - } > - irq = platform_get_irq(pdev, 0); > - if (irq < 0) { > - ret = -ENXIO; > - goto free_master; > - } > - ret = devm_request_irq(&pdev->dev, irq, spi_sirfsoc_irq, 0, > - DRIVER_NAME, sspi); > - if (ret) > - goto free_master; > - > - sspi->bitbang.master = master; > - sspi->bitbang.chipselect = spi_sirfsoc_chipselect; > - sspi->bitbang.setup_transfer = spi_sirfsoc_setup_transfer; > - sspi->bitbang.txrx_bufs = spi_sirfsoc_transfer; > - sspi->bitbang.master->setup = spi_sirfsoc_setup; > - sspi->bitbang.master->cleanup = spi_sirfsoc_cleanup; > - master->bus_num = pdev->id; > - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | SPI_CS_HIGH; > - master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(12) | > - SPI_BPW_MASK(16) | SPI_BPW_MASK(32); > - master->max_speed_hz = SIRFSOC_SPI_DEFAULT_FRQ; > - master->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX; > - sspi->bitbang.master->dev.of_node = pdev->dev.of_node; > - > - /* request DMA channels */ > - sspi->rx_chan = dma_request_chan(&pdev->dev, "rx"); > - if (IS_ERR(sspi->rx_chan)) { > - dev_err(&pdev->dev, "can not allocate rx dma channel\n"); > - ret = PTR_ERR(sspi->rx_chan); > - goto free_master; > - } > - sspi->tx_chan = dma_request_chan(&pdev->dev, "tx"); > - if (IS_ERR(sspi->tx_chan)) { > - dev_err(&pdev->dev, "can not allocate tx dma channel\n"); > - ret = PTR_ERR(sspi->tx_chan); > - goto free_rx_dma; > - } > - > - sspi->clk = clk_get(&pdev->dev, NULL); > - if (IS_ERR(sspi->clk)) { > - ret = PTR_ERR(sspi->clk); > - goto free_tx_dma; > - } > - clk_prepare_enable(sspi->clk); > - if (spi_comp_data->hwinit) > - spi_comp_data->hwinit(sspi); > - sspi->ctrl_freq = clk_get_rate(sspi->clk); > - > - init_completion(&sspi->rx_done); > - init_completion(&sspi->tx_done); > - > - ret = spi_bitbang_start(&sspi->bitbang); > - if (ret) > - goto free_clk; > - dev_info(&pdev->dev, "registered, bus number = %d\n", master->bus_num); > - > - return 0; > -free_clk: > - clk_disable_unprepare(sspi->clk); > - clk_put(sspi->clk); > -free_tx_dma: > - dma_release_channel(sspi->tx_chan); > -free_rx_dma: > - dma_release_channel(sspi->rx_chan); > -free_master: > - spi_master_put(master); > - > - return ret; > -} > - > -static int spi_sirfsoc_remove(struct platform_device *pdev) > -{ > - struct spi_master *master; > - struct sirfsoc_spi *sspi; > - > - master = platform_get_drvdata(pdev); > - sspi = spi_master_get_devdata(master); > - spi_bitbang_stop(&sspi->bitbang); > - clk_disable_unprepare(sspi->clk); > - clk_put(sspi->clk); > - dma_release_channel(sspi->rx_chan); > - dma_release_channel(sspi->tx_chan); > - spi_master_put(master); > - return 0; > -} > - > -#ifdef CONFIG_PM_SLEEP > -static int spi_sirfsoc_suspend(struct device *dev) > -{ > - struct spi_master *master = dev_get_drvdata(dev); > - struct sirfsoc_spi *sspi = spi_master_get_devdata(master); > - int ret; > - > - ret = spi_master_suspend(master); > - if (ret) > - return ret; > - > - clk_disable(sspi->clk); > - return 0; > -} > - > -static int spi_sirfsoc_resume(struct device *dev) > -{ > - struct spi_master *master = dev_get_drvdata(dev); > - struct sirfsoc_spi *sspi = spi_master_get_devdata(master); > - > - clk_enable(sspi->clk); > - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->txfifo_op); > - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->rxfifo_op); > - writel(SIRFSOC_SPI_FIFO_START, sspi->base + sspi->regs->txfifo_op); > - writel(SIRFSOC_SPI_FIFO_START, sspi->base + sspi->regs->rxfifo_op); > - return 0; > -} > -#endif > - > -static SIMPLE_DEV_PM_OPS(spi_sirfsoc_pm_ops, spi_sirfsoc_suspend, > - spi_sirfsoc_resume); > - > -static struct platform_driver spi_sirfsoc_driver = { > - .driver = { > - .name = DRIVER_NAME, > - .pm = &spi_sirfsoc_pm_ops, > - .of_match_table = spi_sirfsoc_of_match, > - }, > - .probe = spi_sirfsoc_probe, > - .remove = spi_sirfsoc_remove, > -}; > -module_platform_driver(spi_sirfsoc_driver); > -MODULE_DESCRIPTION("SiRF SoC SPI master driver"); > -MODULE_AUTHOR("Zhiwu Song <Zhiwu.Song@csr.com>"); > -MODULE_AUTHOR("Barry Song <Baohua.Song@csr.com>"); > -MODULE_AUTHOR("Qipan Li <Qipan.Li@csr.com>"); > -MODULE_LICENSE("GPL v2"); > -- > 2.29.2 >
On Wed, 20 Jan 2021 17:14:00 +0100, Arnd Bergmann wrote: > The CSR SiRF prima2/atlas platforms are getting removed, so this driver > is no longer needed. Applied to https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next Thanks! [1/1] spi: remove sirf prima/atlas driver commit: 181997b4940880b6ebc317b34dca38a17f107318 All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark
diff --git a/Documentation/devicetree/bindings/spi/spi-sirf.txt b/Documentation/devicetree/bindings/spi/spi-sirf.txt deleted file mode 100644 index ddd78ff68fae..000000000000 --- a/Documentation/devicetree/bindings/spi/spi-sirf.txt +++ /dev/null @@ -1,42 +0,0 @@ -* CSR SiRFprimaII Serial Peripheral Interface - -Required properties: -- compatible : Should be "sirf,prima2-spi", "sirf,prima2-usp" - or "sirf,atlas7-usp" -- reg : Offset and length of the register set for the device -- interrupts : Should contain SPI interrupt -- resets: phandle to the reset controller asserting this device in - reset - See ../reset/reset.txt for details. -- dmas : Must contain an entry for each entry in clock-names. - See ../dma/dma.txt for details. -- dma-names : Must include the following entries: - - rx - - tx -- clocks : Must contain an entry for each entry in clock-names. - See ../clocks/clock-bindings.txt for details. - -- #address-cells: Number of cells required to define a chip select - address on the SPI bus. Should be set to 1. -- #size-cells: Should be zero. - -Optional properties: -- spi-max-frequency: Specifies maximum SPI clock frequency, - Units - Hz. Definition as per - Documentation/devicetree/bindings/spi/spi-bus.txt -- cs-gpios: should specify GPIOs used for chipselects. - -Example: - -spi0: spi@b00d0000 { - compatible = "sirf,prima2-spi"; - reg = <0xb00d0000 0x10000>; - interrupts = <15>; - dmas = <&dmac1 9>, - <&dmac1 4>; - dma-names = "rx", "tx"; - #address-cells = <1>; - #size-cells = <0>; - clocks = <&clks 19>; - resets = <&rstc 26>; -}; diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig index 74ea73a05981..855a1ee1c04c 100644 --- a/drivers/spi/Kconfig +++ b/drivers/spi/Kconfig @@ -750,13 +750,6 @@ config SPI_SIFIVE help This exposes the SPI controller IP from SiFive. -config SPI_SIRF - tristate "CSR SiRFprimaII SPI controller" - depends on SIRF_DMA - select SPI_BITBANG - help - SPI driver for CSR SiRFprimaII SoCs - config SPI_SLAVE_MT27XX tristate "MediaTek SPI slave device" depends on ARCH_MEDIATEK || COMPILE_TEST diff --git a/drivers/spi/Makefile b/drivers/spi/Makefile index 6fea5821662e..6c79b83d5f4a 100644 --- a/drivers/spi/Makefile +++ b/drivers/spi/Makefile @@ -105,7 +105,6 @@ obj-$(CONFIG_SPI_SH_HSPI) += spi-sh-hspi.o obj-$(CONFIG_SPI_SH_MSIOF) += spi-sh-msiof.o obj-$(CONFIG_SPI_SH_SCI) += spi-sh-sci.o obj-$(CONFIG_SPI_SIFIVE) += spi-sifive.o -obj-$(CONFIG_SPI_SIRF) += spi-sirf.o obj-$(CONFIG_SPI_SLAVE_MT27XX) += spi-slave-mt27xx.o obj-$(CONFIG_SPI_SPRD) += spi-sprd.o obj-$(CONFIG_SPI_SPRD_ADI) += spi-sprd-adi.o diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c deleted file mode 100644 index 8419e6722e17..000000000000 --- a/drivers/spi/spi-sirf.c +++ /dev/null @@ -1,1236 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * SPI bus driver for CSR SiRFprimaII - * - * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company. - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/clk.h> -#include <linux/completion.h> -#include <linux/interrupt.h> -#include <linux/io.h> -#include <linux/of.h> -#include <linux/bitops.h> -#include <linux/err.h> -#include <linux/platform_device.h> -#include <linux/of_gpio.h> -#include <linux/spi/spi.h> -#include <linux/spi/spi_bitbang.h> -#include <linux/dmaengine.h> -#include <linux/dma-direction.h> -#include <linux/dma-mapping.h> -#include <linux/reset.h> - -#define DRIVER_NAME "sirfsoc_spi" -/* SPI CTRL register defines */ -#define SIRFSOC_SPI_SLV_MODE BIT(16) -#define SIRFSOC_SPI_CMD_MODE BIT(17) -#define SIRFSOC_SPI_CS_IO_OUT BIT(18) -#define SIRFSOC_SPI_CS_IO_MODE BIT(19) -#define SIRFSOC_SPI_CLK_IDLE_STAT BIT(20) -#define SIRFSOC_SPI_CS_IDLE_STAT BIT(21) -#define SIRFSOC_SPI_TRAN_MSB BIT(22) -#define SIRFSOC_SPI_DRV_POS_EDGE BIT(23) -#define SIRFSOC_SPI_CS_HOLD_TIME BIT(24) -#define SIRFSOC_SPI_CLK_SAMPLE_MODE BIT(25) -#define SIRFSOC_SPI_TRAN_DAT_FORMAT_8 (0 << 26) -#define SIRFSOC_SPI_TRAN_DAT_FORMAT_12 (1 << 26) -#define SIRFSOC_SPI_TRAN_DAT_FORMAT_16 (2 << 26) -#define SIRFSOC_SPI_TRAN_DAT_FORMAT_32 (3 << 26) -#define SIRFSOC_SPI_CMD_BYTE_NUM(x) ((x & 3) << 28) -#define SIRFSOC_SPI_ENA_AUTO_CLR BIT(30) -#define SIRFSOC_SPI_MUL_DAT_MODE BIT(31) - -/* Interrupt Enable */ -#define SIRFSOC_SPI_RX_DONE_INT_EN BIT(0) -#define SIRFSOC_SPI_TX_DONE_INT_EN BIT(1) -#define SIRFSOC_SPI_RX_OFLOW_INT_EN BIT(2) -#define SIRFSOC_SPI_TX_UFLOW_INT_EN BIT(3) -#define SIRFSOC_SPI_RX_IO_DMA_INT_EN BIT(4) -#define SIRFSOC_SPI_TX_IO_DMA_INT_EN BIT(5) -#define SIRFSOC_SPI_RXFIFO_FULL_INT_EN BIT(6) -#define SIRFSOC_SPI_TXFIFO_EMPTY_INT_EN BIT(7) -#define SIRFSOC_SPI_RXFIFO_THD_INT_EN BIT(8) -#define SIRFSOC_SPI_TXFIFO_THD_INT_EN BIT(9) -#define SIRFSOC_SPI_FRM_END_INT_EN BIT(10) - -/* Interrupt status */ -#define SIRFSOC_SPI_RX_DONE BIT(0) -#define SIRFSOC_SPI_TX_DONE BIT(1) -#define SIRFSOC_SPI_RX_OFLOW BIT(2) -#define SIRFSOC_SPI_TX_UFLOW BIT(3) -#define SIRFSOC_SPI_RX_IO_DMA BIT(4) -#define SIRFSOC_SPI_RX_FIFO_FULL BIT(6) -#define SIRFSOC_SPI_TXFIFO_EMPTY BIT(7) -#define SIRFSOC_SPI_RXFIFO_THD_REACH BIT(8) -#define SIRFSOC_SPI_TXFIFO_THD_REACH BIT(9) -#define SIRFSOC_SPI_FRM_END BIT(10) - -/* TX RX enable */ -#define SIRFSOC_SPI_RX_EN BIT(0) -#define SIRFSOC_SPI_TX_EN BIT(1) -#define SIRFSOC_SPI_CMD_TX_EN BIT(2) - -#define SIRFSOC_SPI_IO_MODE_SEL BIT(0) -#define SIRFSOC_SPI_RX_DMA_FLUSH BIT(2) - -/* FIFO OPs */ -#define SIRFSOC_SPI_FIFO_RESET BIT(0) -#define SIRFSOC_SPI_FIFO_START BIT(1) - -/* FIFO CTRL */ -#define SIRFSOC_SPI_FIFO_WIDTH_BYTE (0 << 0) -#define SIRFSOC_SPI_FIFO_WIDTH_WORD (1 << 0) -#define SIRFSOC_SPI_FIFO_WIDTH_DWORD (2 << 0) -/* USP related */ -#define SIRFSOC_USP_SYNC_MODE BIT(0) -#define SIRFSOC_USP_SLV_MODE BIT(1) -#define SIRFSOC_USP_LSB BIT(4) -#define SIRFSOC_USP_EN BIT(5) -#define SIRFSOC_USP_RXD_FALLING_EDGE BIT(6) -#define SIRFSOC_USP_TXD_FALLING_EDGE BIT(7) -#define SIRFSOC_USP_CS_HIGH_VALID BIT(9) -#define SIRFSOC_USP_SCLK_IDLE_STAT BIT(11) -#define SIRFSOC_USP_TFS_IO_MODE BIT(14) -#define SIRFSOC_USP_TFS_IO_INPUT BIT(19) - -#define SIRFSOC_USP_RXD_DELAY_LEN_MASK 0xFF -#define SIRFSOC_USP_TXD_DELAY_LEN_MASK 0xFF -#define SIRFSOC_USP_RXD_DELAY_OFFSET 0 -#define SIRFSOC_USP_TXD_DELAY_OFFSET 8 -#define SIRFSOC_USP_RXD_DELAY_LEN 1 -#define SIRFSOC_USP_TXD_DELAY_LEN 1 -#define SIRFSOC_USP_CLK_DIVISOR_OFFSET 21 -#define SIRFSOC_USP_CLK_DIVISOR_MASK 0x3FF -#define SIRFSOC_USP_CLK_10_11_MASK 0x3 -#define SIRFSOC_USP_CLK_10_11_OFFSET 30 -#define SIRFSOC_USP_CLK_12_15_MASK 0xF -#define SIRFSOC_USP_CLK_12_15_OFFSET 24 - -#define SIRFSOC_USP_TX_DATA_OFFSET 0 -#define SIRFSOC_USP_TX_SYNC_OFFSET 8 -#define SIRFSOC_USP_TX_FRAME_OFFSET 16 -#define SIRFSOC_USP_TX_SHIFTER_OFFSET 24 - -#define SIRFSOC_USP_TX_DATA_MASK 0xFF -#define SIRFSOC_USP_TX_SYNC_MASK 0xFF -#define SIRFSOC_USP_TX_FRAME_MASK 0xFF -#define SIRFSOC_USP_TX_SHIFTER_MASK 0x1F - -#define SIRFSOC_USP_RX_DATA_OFFSET 0 -#define SIRFSOC_USP_RX_FRAME_OFFSET 8 -#define SIRFSOC_USP_RX_SHIFTER_OFFSET 16 - -#define SIRFSOC_USP_RX_DATA_MASK 0xFF -#define SIRFSOC_USP_RX_FRAME_MASK 0xFF -#define SIRFSOC_USP_RX_SHIFTER_MASK 0x1F -#define SIRFSOC_USP_CS_HIGH_VALUE BIT(1) - -#define SIRFSOC_SPI_FIFO_SC_OFFSET 0 -#define SIRFSOC_SPI_FIFO_LC_OFFSET 10 -#define SIRFSOC_SPI_FIFO_HC_OFFSET 20 - -#define SIRFSOC_SPI_FIFO_FULL_MASK(s) (1 << ((s)->fifo_full_offset)) -#define SIRFSOC_SPI_FIFO_EMPTY_MASK(s) (1 << ((s)->fifo_full_offset + 1)) -#define SIRFSOC_SPI_FIFO_THD_MASK(s) ((s)->fifo_size - 1) -#define SIRFSOC_SPI_FIFO_THD_OFFSET 2 -#define SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(s, val) \ - ((val) & (s)->fifo_level_chk_mask) - -enum sirf_spi_type { - SIRF_REAL_SPI, - SIRF_USP_SPI_P2, - SIRF_USP_SPI_A7, -}; - -/* - * only if the rx/tx buffer and transfer size are 4-bytes aligned, we use dma - * due to the limitation of dma controller - */ - -#define ALIGNED(x) (!((u32)x & 0x3)) -#define IS_DMA_VALID(x) (x && ALIGNED(x->tx_buf) && ALIGNED(x->rx_buf) && \ - ALIGNED(x->len) && (x->len < 2 * PAGE_SIZE)) - -#define SIRFSOC_MAX_CMD_BYTES 4 -#define SIRFSOC_SPI_DEFAULT_FRQ 1000000 - -struct sirf_spi_register { - /*SPI and USP-SPI common*/ - u32 tx_rx_en; - u32 int_en; - u32 int_st; - u32 tx_dma_io_ctrl; - u32 tx_dma_io_len; - u32 txfifo_ctrl; - u32 txfifo_level_chk; - u32 txfifo_op; - u32 txfifo_st; - u32 txfifo_data; - u32 rx_dma_io_ctrl; - u32 rx_dma_io_len; - u32 rxfifo_ctrl; - u32 rxfifo_level_chk; - u32 rxfifo_op; - u32 rxfifo_st; - u32 rxfifo_data; - /*SPI self*/ - u32 spi_ctrl; - u32 spi_cmd; - u32 spi_dummy_delay_ctrl; - /*USP-SPI self*/ - u32 usp_mode1; - u32 usp_mode2; - u32 usp_tx_frame_ctrl; - u32 usp_rx_frame_ctrl; - u32 usp_pin_io_data; - u32 usp_risc_dsp_mode; - u32 usp_async_param_reg; - u32 usp_irda_x_mode_div; - u32 usp_sm_cfg; - u32 usp_int_en_clr; -}; - -static const struct sirf_spi_register real_spi_register = { - .tx_rx_en = 0x8, - .int_en = 0xc, - .int_st = 0x10, - .tx_dma_io_ctrl = 0x100, - .tx_dma_io_len = 0x104, - .txfifo_ctrl = 0x108, - .txfifo_level_chk = 0x10c, - .txfifo_op = 0x110, - .txfifo_st = 0x114, - .txfifo_data = 0x118, - .rx_dma_io_ctrl = 0x120, - .rx_dma_io_len = 0x124, - .rxfifo_ctrl = 0x128, - .rxfifo_level_chk = 0x12c, - .rxfifo_op = 0x130, - .rxfifo_st = 0x134, - .rxfifo_data = 0x138, - .spi_ctrl = 0x0, - .spi_cmd = 0x4, - .spi_dummy_delay_ctrl = 0x144, -}; - -static const struct sirf_spi_register usp_spi_register = { - .tx_rx_en = 0x10, - .int_en = 0x14, - .int_st = 0x18, - .tx_dma_io_ctrl = 0x100, - .tx_dma_io_len = 0x104, - .txfifo_ctrl = 0x108, - .txfifo_level_chk = 0x10c, - .txfifo_op = 0x110, - .txfifo_st = 0x114, - .txfifo_data = 0x118, - .rx_dma_io_ctrl = 0x120, - .rx_dma_io_len = 0x124, - .rxfifo_ctrl = 0x128, - .rxfifo_level_chk = 0x12c, - .rxfifo_op = 0x130, - .rxfifo_st = 0x134, - .rxfifo_data = 0x138, - .usp_mode1 = 0x0, - .usp_mode2 = 0x4, - .usp_tx_frame_ctrl = 0x8, - .usp_rx_frame_ctrl = 0xc, - .usp_pin_io_data = 0x1c, - .usp_risc_dsp_mode = 0x20, - .usp_async_param_reg = 0x24, - .usp_irda_x_mode_div = 0x28, - .usp_sm_cfg = 0x2c, - .usp_int_en_clr = 0x140, -}; - -struct sirfsoc_spi { - struct spi_bitbang bitbang; - struct completion rx_done; - struct completion tx_done; - - void __iomem *base; - u32 ctrl_freq; /* SPI controller clock speed */ - struct clk *clk; - - /* rx & tx bufs from the spi_transfer */ - const void *tx; - void *rx; - - /* place received word into rx buffer */ - void (*rx_word) (struct sirfsoc_spi *); - /* get word from tx buffer for sending */ - void (*tx_word) (struct sirfsoc_spi *); - - /* number of words left to be tranmitted/received */ - unsigned int left_tx_word; - unsigned int left_rx_word; - - /* rx & tx DMA channels */ - struct dma_chan *rx_chan; - struct dma_chan *tx_chan; - dma_addr_t src_start; - dma_addr_t dst_start; - int word_width; /* in bytes */ - - /* - * if tx size is not more than 4 and rx size is NULL, use - * command model - */ - bool tx_by_cmd; - bool hw_cs; - enum sirf_spi_type type; - const struct sirf_spi_register *regs; - unsigned int fifo_size; - /* fifo empty offset is (fifo full offset + 1)*/ - unsigned int fifo_full_offset; - /* fifo_level_chk_mask is (fifo_size/4 - 1) */ - unsigned int fifo_level_chk_mask; - unsigned int dat_max_frm_len; -}; - -struct sirf_spi_comp_data { - const struct sirf_spi_register *regs; - enum sirf_spi_type type; - unsigned int dat_max_frm_len; - unsigned int fifo_size; - void (*hwinit)(struct sirfsoc_spi *sspi); -}; - -static void sirfsoc_usp_hwinit(struct sirfsoc_spi *sspi) -{ - /* reset USP and let USP can operate */ - writel(readl(sspi->base + sspi->regs->usp_mode1) & - ~SIRFSOC_USP_EN, sspi->base + sspi->regs->usp_mode1); - writel(readl(sspi->base + sspi->regs->usp_mode1) | - SIRFSOC_USP_EN, sspi->base + sspi->regs->usp_mode1); -} - -static void spi_sirfsoc_rx_word_u8(struct sirfsoc_spi *sspi) -{ - u32 data; - u8 *rx = sspi->rx; - - data = readl(sspi->base + sspi->regs->rxfifo_data); - - if (rx) { - *rx++ = (u8) data; - sspi->rx = rx; - } - - sspi->left_rx_word--; -} - -static void spi_sirfsoc_tx_word_u8(struct sirfsoc_spi *sspi) -{ - u32 data = 0; - const u8 *tx = sspi->tx; - - if (tx) { - data = *tx++; - sspi->tx = tx; - } - writel(data, sspi->base + sspi->regs->txfifo_data); - sspi->left_tx_word--; -} - -static void spi_sirfsoc_rx_word_u16(struct sirfsoc_spi *sspi) -{ - u32 data; - u16 *rx = sspi->rx; - - data = readl(sspi->base + sspi->regs->rxfifo_data); - - if (rx) { - *rx++ = (u16) data; - sspi->rx = rx; - } - - sspi->left_rx_word--; -} - -static void spi_sirfsoc_tx_word_u16(struct sirfsoc_spi *sspi) -{ - u32 data = 0; - const u16 *tx = sspi->tx; - - if (tx) { - data = *tx++; - sspi->tx = tx; - } - - writel(data, sspi->base + sspi->regs->txfifo_data); - sspi->left_tx_word--; -} - -static void spi_sirfsoc_rx_word_u32(struct sirfsoc_spi *sspi) -{ - u32 data; - u32 *rx = sspi->rx; - - data = readl(sspi->base + sspi->regs->rxfifo_data); - - if (rx) { - *rx++ = (u32) data; - sspi->rx = rx; - } - - sspi->left_rx_word--; - -} - -static void spi_sirfsoc_tx_word_u32(struct sirfsoc_spi *sspi) -{ - u32 data = 0; - const u32 *tx = sspi->tx; - - if (tx) { - data = *tx++; - sspi->tx = tx; - } - - writel(data, sspi->base + sspi->regs->txfifo_data); - sspi->left_tx_word--; -} - -static irqreturn_t spi_sirfsoc_irq(int irq, void *dev_id) -{ - struct sirfsoc_spi *sspi = dev_id; - u32 spi_stat; - - spi_stat = readl(sspi->base + sspi->regs->int_st); - if (sspi->tx_by_cmd && sspi->type == SIRF_REAL_SPI - && (spi_stat & SIRFSOC_SPI_FRM_END)) { - complete(&sspi->tx_done); - writel(0x0, sspi->base + sspi->regs->int_en); - writel(readl(sspi->base + sspi->regs->int_st), - sspi->base + sspi->regs->int_st); - return IRQ_HANDLED; - } - /* Error Conditions */ - if (spi_stat & SIRFSOC_SPI_RX_OFLOW || - spi_stat & SIRFSOC_SPI_TX_UFLOW) { - complete(&sspi->tx_done); - complete(&sspi->rx_done); - switch (sspi->type) { - case SIRF_REAL_SPI: - case SIRF_USP_SPI_P2: - writel(0x0, sspi->base + sspi->regs->int_en); - break; - case SIRF_USP_SPI_A7: - writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr); - break; - } - writel(readl(sspi->base + sspi->regs->int_st), - sspi->base + sspi->regs->int_st); - return IRQ_HANDLED; - } - if (spi_stat & SIRFSOC_SPI_TXFIFO_EMPTY) - complete(&sspi->tx_done); - while (!(readl(sspi->base + sspi->regs->int_st) & - SIRFSOC_SPI_RX_IO_DMA)) - cpu_relax(); - complete(&sspi->rx_done); - switch (sspi->type) { - case SIRF_REAL_SPI: - case SIRF_USP_SPI_P2: - writel(0x0, sspi->base + sspi->regs->int_en); - break; - case SIRF_USP_SPI_A7: - writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr); - break; - } - writel(readl(sspi->base + sspi->regs->int_st), - sspi->base + sspi->regs->int_st); - - return IRQ_HANDLED; -} - -static void spi_sirfsoc_dma_fini_callback(void *data) -{ - struct completion *dma_complete = data; - - complete(dma_complete); -} - -static void spi_sirfsoc_cmd_transfer(struct spi_device *spi, - struct spi_transfer *t) -{ - struct sirfsoc_spi *sspi; - int timeout = t->len * 10; - u32 cmd; - - sspi = spi_master_get_devdata(spi->master); - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->txfifo_op); - writel(SIRFSOC_SPI_FIFO_START, sspi->base + sspi->regs->txfifo_op); - memcpy(&cmd, sspi->tx, t->len); - if (sspi->word_width == 1 && !(spi->mode & SPI_LSB_FIRST)) - cmd = cpu_to_be32(cmd) >> - ((SIRFSOC_MAX_CMD_BYTES - t->len) * 8); - if (sspi->word_width == 2 && t->len == 4 && - (!(spi->mode & SPI_LSB_FIRST))) - cmd = ((cmd & 0xffff) << 16) | (cmd >> 16); - writel(cmd, sspi->base + sspi->regs->spi_cmd); - writel(SIRFSOC_SPI_FRM_END_INT_EN, - sspi->base + sspi->regs->int_en); - writel(SIRFSOC_SPI_CMD_TX_EN, - sspi->base + sspi->regs->tx_rx_en); - if (wait_for_completion_timeout(&sspi->tx_done, timeout) == 0) { - dev_err(&spi->dev, "cmd transfer timeout\n"); - return; - } - sspi->left_rx_word -= t->len; -} - -static void spi_sirfsoc_dma_transfer(struct spi_device *spi, - struct spi_transfer *t) -{ - struct sirfsoc_spi *sspi; - struct dma_async_tx_descriptor *rx_desc, *tx_desc; - int timeout = t->len * 10; - - sspi = spi_master_get_devdata(spi->master); - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->rxfifo_op); - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->txfifo_op); - switch (sspi->type) { - case SIRF_REAL_SPI: - writel(SIRFSOC_SPI_FIFO_START, - sspi->base + sspi->regs->rxfifo_op); - writel(SIRFSOC_SPI_FIFO_START, - sspi->base + sspi->regs->txfifo_op); - writel(0, sspi->base + sspi->regs->int_en); - break; - case SIRF_USP_SPI_P2: - writel(0x0, sspi->base + sspi->regs->rxfifo_op); - writel(0x0, sspi->base + sspi->regs->txfifo_op); - writel(0, sspi->base + sspi->regs->int_en); - break; - case SIRF_USP_SPI_A7: - writel(0x0, sspi->base + sspi->regs->rxfifo_op); - writel(0x0, sspi->base + sspi->regs->txfifo_op); - writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr); - break; - } - writel(readl(sspi->base + sspi->regs->int_st), - sspi->base + sspi->regs->int_st); - if (sspi->left_tx_word < sspi->dat_max_frm_len) { - switch (sspi->type) { - case SIRF_REAL_SPI: - writel(readl(sspi->base + sspi->regs->spi_ctrl) | - SIRFSOC_SPI_ENA_AUTO_CLR | - SIRFSOC_SPI_MUL_DAT_MODE, - sspi->base + sspi->regs->spi_ctrl); - writel(sspi->left_tx_word - 1, - sspi->base + sspi->regs->tx_dma_io_len); - writel(sspi->left_tx_word - 1, - sspi->base + sspi->regs->rx_dma_io_len); - break; - case SIRF_USP_SPI_P2: - case SIRF_USP_SPI_A7: - /*USP simulate SPI, tx/rx_dma_io_len indicates bytes*/ - writel(sspi->left_tx_word * sspi->word_width, - sspi->base + sspi->regs->tx_dma_io_len); - writel(sspi->left_tx_word * sspi->word_width, - sspi->base + sspi->regs->rx_dma_io_len); - break; - } - } else { - if (sspi->type == SIRF_REAL_SPI) - writel(readl(sspi->base + sspi->regs->spi_ctrl), - sspi->base + sspi->regs->spi_ctrl); - writel(0, sspi->base + sspi->regs->tx_dma_io_len); - writel(0, sspi->base + sspi->regs->rx_dma_io_len); - } - sspi->dst_start = dma_map_single(&spi->dev, sspi->rx, t->len, - (t->tx_buf != t->rx_buf) ? - DMA_FROM_DEVICE : DMA_BIDIRECTIONAL); - rx_desc = dmaengine_prep_slave_single(sspi->rx_chan, - sspi->dst_start, t->len, DMA_DEV_TO_MEM, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); - rx_desc->callback = spi_sirfsoc_dma_fini_callback; - rx_desc->callback_param = &sspi->rx_done; - - sspi->src_start = dma_map_single(&spi->dev, (void *)sspi->tx, t->len, - (t->tx_buf != t->rx_buf) ? - DMA_TO_DEVICE : DMA_BIDIRECTIONAL); - tx_desc = dmaengine_prep_slave_single(sspi->tx_chan, - sspi->src_start, t->len, DMA_MEM_TO_DEV, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); - tx_desc->callback = spi_sirfsoc_dma_fini_callback; - tx_desc->callback_param = &sspi->tx_done; - - dmaengine_submit(tx_desc); - dmaengine_submit(rx_desc); - dma_async_issue_pending(sspi->tx_chan); - dma_async_issue_pending(sspi->rx_chan); - writel(SIRFSOC_SPI_RX_EN | SIRFSOC_SPI_TX_EN, - sspi->base + sspi->regs->tx_rx_en); - if (sspi->type == SIRF_USP_SPI_P2 || - sspi->type == SIRF_USP_SPI_A7) { - writel(SIRFSOC_SPI_FIFO_START, - sspi->base + sspi->regs->rxfifo_op); - writel(SIRFSOC_SPI_FIFO_START, - sspi->base + sspi->regs->txfifo_op); - } - if (wait_for_completion_timeout(&sspi->rx_done, timeout) == 0) { - dev_err(&spi->dev, "transfer timeout\n"); - dmaengine_terminate_all(sspi->rx_chan); - } else - sspi->left_rx_word = 0; - /* - * we only wait tx-done event if transferring by DMA. for PIO, - * we get rx data by writing tx data, so if rx is done, tx has - * done earlier - */ - if (wait_for_completion_timeout(&sspi->tx_done, timeout) == 0) { - dev_err(&spi->dev, "transfer timeout\n"); - if (sspi->type == SIRF_USP_SPI_P2 || - sspi->type == SIRF_USP_SPI_A7) - writel(0, sspi->base + sspi->regs->tx_rx_en); - dmaengine_terminate_all(sspi->tx_chan); - } - dma_unmap_single(&spi->dev, sspi->src_start, t->len, DMA_TO_DEVICE); - dma_unmap_single(&spi->dev, sspi->dst_start, t->len, DMA_FROM_DEVICE); - /* TX, RX FIFO stop */ - writel(0, sspi->base + sspi->regs->rxfifo_op); - writel(0, sspi->base + sspi->regs->txfifo_op); - if (sspi->left_tx_word >= sspi->dat_max_frm_len) - writel(0, sspi->base + sspi->regs->tx_rx_en); - if (sspi->type == SIRF_USP_SPI_P2 || - sspi->type == SIRF_USP_SPI_A7) - writel(0, sspi->base + sspi->regs->tx_rx_en); -} - -static void spi_sirfsoc_pio_transfer(struct spi_device *spi, - struct spi_transfer *t) -{ - struct sirfsoc_spi *sspi; - int timeout = t->len * 10; - unsigned int data_units; - - sspi = spi_master_get_devdata(spi->master); - do { - writel(SIRFSOC_SPI_FIFO_RESET, - sspi->base + sspi->regs->rxfifo_op); - writel(SIRFSOC_SPI_FIFO_RESET, - sspi->base + sspi->regs->txfifo_op); - switch (sspi->type) { - case SIRF_USP_SPI_P2: - writel(0x0, sspi->base + sspi->regs->rxfifo_op); - writel(0x0, sspi->base + sspi->regs->txfifo_op); - writel(0, sspi->base + sspi->regs->int_en); - writel(readl(sspi->base + sspi->regs->int_st), - sspi->base + sspi->regs->int_st); - writel(min((sspi->left_tx_word * sspi->word_width), - sspi->fifo_size), - sspi->base + sspi->regs->tx_dma_io_len); - writel(min((sspi->left_rx_word * sspi->word_width), - sspi->fifo_size), - sspi->base + sspi->regs->rx_dma_io_len); - break; - case SIRF_USP_SPI_A7: - writel(0x0, sspi->base + sspi->regs->rxfifo_op); - writel(0x0, sspi->base + sspi->regs->txfifo_op); - writel(~0UL, sspi->base + sspi->regs->usp_int_en_clr); - writel(readl(sspi->base + sspi->regs->int_st), - sspi->base + sspi->regs->int_st); - writel(min((sspi->left_tx_word * sspi->word_width), - sspi->fifo_size), - sspi->base + sspi->regs->tx_dma_io_len); - writel(min((sspi->left_rx_word * sspi->word_width), - sspi->fifo_size), - sspi->base + sspi->regs->rx_dma_io_len); - break; - case SIRF_REAL_SPI: - writel(SIRFSOC_SPI_FIFO_START, - sspi->base + sspi->regs->rxfifo_op); - writel(SIRFSOC_SPI_FIFO_START, - sspi->base + sspi->regs->txfifo_op); - writel(0, sspi->base + sspi->regs->int_en); - writel(readl(sspi->base + sspi->regs->int_st), - sspi->base + sspi->regs->int_st); - writel(readl(sspi->base + sspi->regs->spi_ctrl) | - SIRFSOC_SPI_MUL_DAT_MODE | - SIRFSOC_SPI_ENA_AUTO_CLR, - sspi->base + sspi->regs->spi_ctrl); - data_units = sspi->fifo_size / sspi->word_width; - writel(min(sspi->left_tx_word, data_units) - 1, - sspi->base + sspi->regs->tx_dma_io_len); - writel(min(sspi->left_rx_word, data_units) - 1, - sspi->base + sspi->regs->rx_dma_io_len); - break; - } - while (!((readl(sspi->base + sspi->regs->txfifo_st) - & SIRFSOC_SPI_FIFO_FULL_MASK(sspi))) && - sspi->left_tx_word) - sspi->tx_word(sspi); - writel(SIRFSOC_SPI_TXFIFO_EMPTY_INT_EN | - SIRFSOC_SPI_TX_UFLOW_INT_EN | - SIRFSOC_SPI_RX_OFLOW_INT_EN | - SIRFSOC_SPI_RX_IO_DMA_INT_EN, - sspi->base + sspi->regs->int_en); - writel(SIRFSOC_SPI_RX_EN | SIRFSOC_SPI_TX_EN, - sspi->base + sspi->regs->tx_rx_en); - if (sspi->type == SIRF_USP_SPI_P2 || - sspi->type == SIRF_USP_SPI_A7) { - writel(SIRFSOC_SPI_FIFO_START, - sspi->base + sspi->regs->rxfifo_op); - writel(SIRFSOC_SPI_FIFO_START, - sspi->base + sspi->regs->txfifo_op); - } - if (!wait_for_completion_timeout(&sspi->tx_done, timeout) || - !wait_for_completion_timeout(&sspi->rx_done, timeout)) { - dev_err(&spi->dev, "transfer timeout\n"); - if (sspi->type == SIRF_USP_SPI_P2 || - sspi->type == SIRF_USP_SPI_A7) - writel(0, sspi->base + sspi->regs->tx_rx_en); - break; - } - while (!((readl(sspi->base + sspi->regs->rxfifo_st) - & SIRFSOC_SPI_FIFO_EMPTY_MASK(sspi))) && - sspi->left_rx_word) - sspi->rx_word(sspi); - if (sspi->type == SIRF_USP_SPI_P2 || - sspi->type == SIRF_USP_SPI_A7) - writel(0, sspi->base + sspi->regs->tx_rx_en); - writel(0, sspi->base + sspi->regs->rxfifo_op); - writel(0, sspi->base + sspi->regs->txfifo_op); - } while (sspi->left_tx_word != 0 || sspi->left_rx_word != 0); -} - -static int spi_sirfsoc_transfer(struct spi_device *spi, struct spi_transfer *t) -{ - struct sirfsoc_spi *sspi; - - sspi = spi_master_get_devdata(spi->master); - sspi->tx = t->tx_buf; - sspi->rx = t->rx_buf; - sspi->left_tx_word = sspi->left_rx_word = t->len / sspi->word_width; - reinit_completion(&sspi->rx_done); - reinit_completion(&sspi->tx_done); - /* - * in the transfer, if transfer data using command register with rx_buf - * null, just fill command data into command register and wait for its - * completion. - */ - if (sspi->type == SIRF_REAL_SPI && sspi->tx_by_cmd) - spi_sirfsoc_cmd_transfer(spi, t); - else if (IS_DMA_VALID(t)) - spi_sirfsoc_dma_transfer(spi, t); - else - spi_sirfsoc_pio_transfer(spi, t); - - return t->len - sspi->left_rx_word * sspi->word_width; -} - -static void spi_sirfsoc_chipselect(struct spi_device *spi, int value) -{ - struct sirfsoc_spi *sspi = spi_master_get_devdata(spi->master); - - if (sspi->hw_cs) { - u32 regval; - - switch (sspi->type) { - case SIRF_REAL_SPI: - regval = readl(sspi->base + sspi->regs->spi_ctrl); - switch (value) { - case BITBANG_CS_ACTIVE: - if (spi->mode & SPI_CS_HIGH) - regval |= SIRFSOC_SPI_CS_IO_OUT; - else - regval &= ~SIRFSOC_SPI_CS_IO_OUT; - break; - case BITBANG_CS_INACTIVE: - if (spi->mode & SPI_CS_HIGH) - regval &= ~SIRFSOC_SPI_CS_IO_OUT; - else - regval |= SIRFSOC_SPI_CS_IO_OUT; - break; - } - writel(regval, sspi->base + sspi->regs->spi_ctrl); - break; - case SIRF_USP_SPI_P2: - case SIRF_USP_SPI_A7: - regval = readl(sspi->base + - sspi->regs->usp_pin_io_data); - switch (value) { - case BITBANG_CS_ACTIVE: - if (spi->mode & SPI_CS_HIGH) - regval |= SIRFSOC_USP_CS_HIGH_VALUE; - else - regval &= ~(SIRFSOC_USP_CS_HIGH_VALUE); - break; - case BITBANG_CS_INACTIVE: - if (spi->mode & SPI_CS_HIGH) - regval &= ~(SIRFSOC_USP_CS_HIGH_VALUE); - else - regval |= SIRFSOC_USP_CS_HIGH_VALUE; - break; - } - writel(regval, - sspi->base + sspi->regs->usp_pin_io_data); - break; - } - } else { - switch (value) { - case BITBANG_CS_ACTIVE: - gpio_direction_output(spi->cs_gpio, - spi->mode & SPI_CS_HIGH ? 1 : 0); - break; - case BITBANG_CS_INACTIVE: - gpio_direction_output(spi->cs_gpio, - spi->mode & SPI_CS_HIGH ? 0 : 1); - break; - } - } -} - -static int spi_sirfsoc_config_mode(struct spi_device *spi) -{ - struct sirfsoc_spi *sspi; - u32 regval, usp_mode1; - - sspi = spi_master_get_devdata(spi->master); - regval = readl(sspi->base + sspi->regs->spi_ctrl); - usp_mode1 = readl(sspi->base + sspi->regs->usp_mode1); - if (!(spi->mode & SPI_CS_HIGH)) { - regval |= SIRFSOC_SPI_CS_IDLE_STAT; - usp_mode1 &= ~SIRFSOC_USP_CS_HIGH_VALID; - } else { - regval &= ~SIRFSOC_SPI_CS_IDLE_STAT; - usp_mode1 |= SIRFSOC_USP_CS_HIGH_VALID; - } - if (!(spi->mode & SPI_LSB_FIRST)) { - regval |= SIRFSOC_SPI_TRAN_MSB; - usp_mode1 &= ~SIRFSOC_USP_LSB; - } else { - regval &= ~SIRFSOC_SPI_TRAN_MSB; - usp_mode1 |= SIRFSOC_USP_LSB; - } - if (spi->mode & SPI_CPOL) { - regval |= SIRFSOC_SPI_CLK_IDLE_STAT; - usp_mode1 |= SIRFSOC_USP_SCLK_IDLE_STAT; - } else { - regval &= ~SIRFSOC_SPI_CLK_IDLE_STAT; - usp_mode1 &= ~SIRFSOC_USP_SCLK_IDLE_STAT; - } - /* - * Data should be driven at least 1/2 cycle before the fetch edge - * to make sure that data gets stable at the fetch edge. - */ - if (((spi->mode & SPI_CPOL) && (spi->mode & SPI_CPHA)) || - (!(spi->mode & SPI_CPOL) && !(spi->mode & SPI_CPHA))) { - regval &= ~SIRFSOC_SPI_DRV_POS_EDGE; - usp_mode1 |= (SIRFSOC_USP_TXD_FALLING_EDGE | - SIRFSOC_USP_RXD_FALLING_EDGE); - } else { - regval |= SIRFSOC_SPI_DRV_POS_EDGE; - usp_mode1 &= ~(SIRFSOC_USP_RXD_FALLING_EDGE | - SIRFSOC_USP_TXD_FALLING_EDGE); - } - writel((SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size - 2) << - SIRFSOC_SPI_FIFO_SC_OFFSET) | - (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size / 2) << - SIRFSOC_SPI_FIFO_LC_OFFSET) | - (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, 2) << - SIRFSOC_SPI_FIFO_HC_OFFSET), - sspi->base + sspi->regs->txfifo_level_chk); - writel((SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, 2) << - SIRFSOC_SPI_FIFO_SC_OFFSET) | - (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size / 2) << - SIRFSOC_SPI_FIFO_LC_OFFSET) | - (SIRFSOC_SPI_FIFO_LEVEL_CHK_MASK(sspi, sspi->fifo_size - 2) << - SIRFSOC_SPI_FIFO_HC_OFFSET), - sspi->base + sspi->regs->rxfifo_level_chk); - /* - * it should never set to hardware cs mode because in hardware cs mode, - * cs signal can't controlled by driver. - */ - switch (sspi->type) { - case SIRF_REAL_SPI: - regval |= SIRFSOC_SPI_CS_IO_MODE; - writel(regval, sspi->base + sspi->regs->spi_ctrl); - break; - case SIRF_USP_SPI_P2: - case SIRF_USP_SPI_A7: - usp_mode1 |= SIRFSOC_USP_SYNC_MODE; - usp_mode1 |= SIRFSOC_USP_TFS_IO_MODE; - usp_mode1 &= ~SIRFSOC_USP_TFS_IO_INPUT; - writel(usp_mode1, sspi->base + sspi->regs->usp_mode1); - break; - } - - return 0; -} - -static int -spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t) -{ - struct sirfsoc_spi *sspi; - u8 bits_per_word = 0; - int hz = 0; - u32 regval, txfifo_ctrl, rxfifo_ctrl, tx_frm_ctl, rx_frm_ctl, usp_mode2; - - sspi = spi_master_get_devdata(spi->master); - - bits_per_word = (t) ? t->bits_per_word : spi->bits_per_word; - hz = t && t->speed_hz ? t->speed_hz : spi->max_speed_hz; - - usp_mode2 = regval = (sspi->ctrl_freq / (2 * hz)) - 1; - if (regval > 0xFFFF || regval < 0) { - dev_err(&spi->dev, "Speed %d not supported\n", hz); - return -EINVAL; - } - switch (bits_per_word) { - case 8: - regval |= SIRFSOC_SPI_TRAN_DAT_FORMAT_8; - sspi->rx_word = spi_sirfsoc_rx_word_u8; - sspi->tx_word = spi_sirfsoc_tx_word_u8; - break; - case 12: - case 16: - regval |= (bits_per_word == 12) ? - SIRFSOC_SPI_TRAN_DAT_FORMAT_12 : - SIRFSOC_SPI_TRAN_DAT_FORMAT_16; - sspi->rx_word = spi_sirfsoc_rx_word_u16; - sspi->tx_word = spi_sirfsoc_tx_word_u16; - break; - case 32: - regval |= SIRFSOC_SPI_TRAN_DAT_FORMAT_32; - sspi->rx_word = spi_sirfsoc_rx_word_u32; - sspi->tx_word = spi_sirfsoc_tx_word_u32; - break; - default: - dev_err(&spi->dev, "bpw %d not supported\n", bits_per_word); - return -EINVAL; - } - sspi->word_width = DIV_ROUND_UP(bits_per_word, 8); - txfifo_ctrl = (((sspi->fifo_size / 2) & - SIRFSOC_SPI_FIFO_THD_MASK(sspi)) - << SIRFSOC_SPI_FIFO_THD_OFFSET) | - (sspi->word_width >> 1); - rxfifo_ctrl = (((sspi->fifo_size / 2) & - SIRFSOC_SPI_FIFO_THD_MASK(sspi)) - << SIRFSOC_SPI_FIFO_THD_OFFSET) | - (sspi->word_width >> 1); - writel(txfifo_ctrl, sspi->base + sspi->regs->txfifo_ctrl); - writel(rxfifo_ctrl, sspi->base + sspi->regs->rxfifo_ctrl); - if (sspi->type == SIRF_USP_SPI_P2 || - sspi->type == SIRF_USP_SPI_A7) { - tx_frm_ctl = 0; - tx_frm_ctl |= ((bits_per_word - 1) & SIRFSOC_USP_TX_DATA_MASK) - << SIRFSOC_USP_TX_DATA_OFFSET; - tx_frm_ctl |= ((bits_per_word + 1 + SIRFSOC_USP_TXD_DELAY_LEN - - 1) & SIRFSOC_USP_TX_SYNC_MASK) << - SIRFSOC_USP_TX_SYNC_OFFSET; - tx_frm_ctl |= ((bits_per_word + 1 + SIRFSOC_USP_TXD_DELAY_LEN - + 2 - 1) & SIRFSOC_USP_TX_FRAME_MASK) << - SIRFSOC_USP_TX_FRAME_OFFSET; - tx_frm_ctl |= ((bits_per_word - 1) & - SIRFSOC_USP_TX_SHIFTER_MASK) << - SIRFSOC_USP_TX_SHIFTER_OFFSET; - rx_frm_ctl = 0; - rx_frm_ctl |= ((bits_per_word - 1) & SIRFSOC_USP_RX_DATA_MASK) - << SIRFSOC_USP_RX_DATA_OFFSET; - rx_frm_ctl |= ((bits_per_word + 1 + SIRFSOC_USP_RXD_DELAY_LEN - + 2 - 1) & SIRFSOC_USP_RX_FRAME_MASK) << - SIRFSOC_USP_RX_FRAME_OFFSET; - rx_frm_ctl |= ((bits_per_word - 1) - & SIRFSOC_USP_RX_SHIFTER_MASK) << - SIRFSOC_USP_RX_SHIFTER_OFFSET; - writel(tx_frm_ctl | (((usp_mode2 >> 10) & - SIRFSOC_USP_CLK_10_11_MASK) << - SIRFSOC_USP_CLK_10_11_OFFSET), - sspi->base + sspi->regs->usp_tx_frame_ctrl); - writel(rx_frm_ctl | (((usp_mode2 >> 12) & - SIRFSOC_USP_CLK_12_15_MASK) << - SIRFSOC_USP_CLK_12_15_OFFSET), - sspi->base + sspi->regs->usp_rx_frame_ctrl); - writel(readl(sspi->base + sspi->regs->usp_mode2) | - ((usp_mode2 & SIRFSOC_USP_CLK_DIVISOR_MASK) << - SIRFSOC_USP_CLK_DIVISOR_OFFSET) | - (SIRFSOC_USP_RXD_DELAY_LEN << - SIRFSOC_USP_RXD_DELAY_OFFSET) | - (SIRFSOC_USP_TXD_DELAY_LEN << - SIRFSOC_USP_TXD_DELAY_OFFSET), - sspi->base + sspi->regs->usp_mode2); - } - if (sspi->type == SIRF_REAL_SPI) - writel(regval, sspi->base + sspi->regs->spi_ctrl); - spi_sirfsoc_config_mode(spi); - if (sspi->type == SIRF_REAL_SPI) { - if (t && t->tx_buf && !t->rx_buf && - (t->len <= SIRFSOC_MAX_CMD_BYTES)) { - sspi->tx_by_cmd = true; - writel(readl(sspi->base + sspi->regs->spi_ctrl) | - (SIRFSOC_SPI_CMD_BYTE_NUM((t->len - 1)) | - SIRFSOC_SPI_CMD_MODE), - sspi->base + sspi->regs->spi_ctrl); - } else { - sspi->tx_by_cmd = false; - writel(readl(sspi->base + sspi->regs->spi_ctrl) & - ~SIRFSOC_SPI_CMD_MODE, - sspi->base + sspi->regs->spi_ctrl); - } - } - if (IS_DMA_VALID(t)) { - /* Enable DMA mode for RX, TX */ - writel(0, sspi->base + sspi->regs->tx_dma_io_ctrl); - writel(SIRFSOC_SPI_RX_DMA_FLUSH, - sspi->base + sspi->regs->rx_dma_io_ctrl); - } else { - /* Enable IO mode for RX, TX */ - writel(SIRFSOC_SPI_IO_MODE_SEL, - sspi->base + sspi->regs->tx_dma_io_ctrl); - writel(SIRFSOC_SPI_IO_MODE_SEL, - sspi->base + sspi->regs->rx_dma_io_ctrl); - } - return 0; -} - -static int spi_sirfsoc_setup(struct spi_device *spi) -{ - struct sirfsoc_spi *sspi; - int ret = 0; - - sspi = spi_master_get_devdata(spi->master); - if (spi->cs_gpio == -ENOENT) - sspi->hw_cs = true; - else { - sspi->hw_cs = false; - if (!spi_get_ctldata(spi)) { - void *cs = kmalloc(sizeof(int), GFP_KERNEL); - if (!cs) { - ret = -ENOMEM; - goto exit; - } - ret = gpio_is_valid(spi->cs_gpio); - if (!ret) { - dev_err(&spi->dev, "no valid gpio\n"); - ret = -ENOENT; - goto exit; - } - ret = gpio_request(spi->cs_gpio, DRIVER_NAME); - if (ret) { - dev_err(&spi->dev, "failed to request gpio\n"); - goto exit; - } - spi_set_ctldata(spi, cs); - } - } - spi_sirfsoc_config_mode(spi); - spi_sirfsoc_chipselect(spi, BITBANG_CS_INACTIVE); -exit: - return ret; -} - -static void spi_sirfsoc_cleanup(struct spi_device *spi) -{ - if (spi_get_ctldata(spi)) { - gpio_free(spi->cs_gpio); - kfree(spi_get_ctldata(spi)); - } -} - -static const struct sirf_spi_comp_data sirf_real_spi = { - .regs = &real_spi_register, - .type = SIRF_REAL_SPI, - .dat_max_frm_len = 64 * 1024, - .fifo_size = 256, -}; - -static const struct sirf_spi_comp_data sirf_usp_spi_p2 = { - .regs = &usp_spi_register, - .type = SIRF_USP_SPI_P2, - .dat_max_frm_len = 1024 * 1024, - .fifo_size = 128, - .hwinit = sirfsoc_usp_hwinit, -}; - -static const struct sirf_spi_comp_data sirf_usp_spi_a7 = { - .regs = &usp_spi_register, - .type = SIRF_USP_SPI_A7, - .dat_max_frm_len = 1024 * 1024, - .fifo_size = 512, - .hwinit = sirfsoc_usp_hwinit, -}; - -static const struct of_device_id spi_sirfsoc_of_match[] = { - { .compatible = "sirf,prima2-spi", .data = &sirf_real_spi}, - { .compatible = "sirf,prima2-usp-spi", .data = &sirf_usp_spi_p2}, - { .compatible = "sirf,atlas7-usp-spi", .data = &sirf_usp_spi_a7}, - {} -}; -MODULE_DEVICE_TABLE(of, spi_sirfsoc_of_match); - -static int spi_sirfsoc_probe(struct platform_device *pdev) -{ - struct sirfsoc_spi *sspi; - struct spi_master *master; - const struct sirf_spi_comp_data *spi_comp_data; - int irq; - int ret; - const struct of_device_id *match; - - ret = device_reset(&pdev->dev); - if (ret) { - dev_err(&pdev->dev, "SPI reset failed!\n"); - return ret; - } - - master = spi_alloc_master(&pdev->dev, sizeof(*sspi)); - if (!master) { - dev_err(&pdev->dev, "Unable to allocate SPI master\n"); - return -ENOMEM; - } - match = of_match_node(spi_sirfsoc_of_match, pdev->dev.of_node); - platform_set_drvdata(pdev, master); - sspi = spi_master_get_devdata(master); - sspi->fifo_full_offset = ilog2(sspi->fifo_size); - spi_comp_data = match->data; - sspi->regs = spi_comp_data->regs; - sspi->type = spi_comp_data->type; - sspi->fifo_level_chk_mask = (sspi->fifo_size / 4) - 1; - sspi->dat_max_frm_len = spi_comp_data->dat_max_frm_len; - sspi->fifo_size = spi_comp_data->fifo_size; - sspi->base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(sspi->base)) { - ret = PTR_ERR(sspi->base); - goto free_master; - } - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - ret = -ENXIO; - goto free_master; - } - ret = devm_request_irq(&pdev->dev, irq, spi_sirfsoc_irq, 0, - DRIVER_NAME, sspi); - if (ret) - goto free_master; - - sspi->bitbang.master = master; - sspi->bitbang.chipselect = spi_sirfsoc_chipselect; - sspi->bitbang.setup_transfer = spi_sirfsoc_setup_transfer; - sspi->bitbang.txrx_bufs = spi_sirfsoc_transfer; - sspi->bitbang.master->setup = spi_sirfsoc_setup; - sspi->bitbang.master->cleanup = spi_sirfsoc_cleanup; - master->bus_num = pdev->id; - master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST | SPI_CS_HIGH; - master->bits_per_word_mask = SPI_BPW_MASK(8) | SPI_BPW_MASK(12) | - SPI_BPW_MASK(16) | SPI_BPW_MASK(32); - master->max_speed_hz = SIRFSOC_SPI_DEFAULT_FRQ; - master->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX; - sspi->bitbang.master->dev.of_node = pdev->dev.of_node; - - /* request DMA channels */ - sspi->rx_chan = dma_request_chan(&pdev->dev, "rx"); - if (IS_ERR(sspi->rx_chan)) { - dev_err(&pdev->dev, "can not allocate rx dma channel\n"); - ret = PTR_ERR(sspi->rx_chan); - goto free_master; - } - sspi->tx_chan = dma_request_chan(&pdev->dev, "tx"); - if (IS_ERR(sspi->tx_chan)) { - dev_err(&pdev->dev, "can not allocate tx dma channel\n"); - ret = PTR_ERR(sspi->tx_chan); - goto free_rx_dma; - } - - sspi->clk = clk_get(&pdev->dev, NULL); - if (IS_ERR(sspi->clk)) { - ret = PTR_ERR(sspi->clk); - goto free_tx_dma; - } - clk_prepare_enable(sspi->clk); - if (spi_comp_data->hwinit) - spi_comp_data->hwinit(sspi); - sspi->ctrl_freq = clk_get_rate(sspi->clk); - - init_completion(&sspi->rx_done); - init_completion(&sspi->tx_done); - - ret = spi_bitbang_start(&sspi->bitbang); - if (ret) - goto free_clk; - dev_info(&pdev->dev, "registered, bus number = %d\n", master->bus_num); - - return 0; -free_clk: - clk_disable_unprepare(sspi->clk); - clk_put(sspi->clk); -free_tx_dma: - dma_release_channel(sspi->tx_chan); -free_rx_dma: - dma_release_channel(sspi->rx_chan); -free_master: - spi_master_put(master); - - return ret; -} - -static int spi_sirfsoc_remove(struct platform_device *pdev) -{ - struct spi_master *master; - struct sirfsoc_spi *sspi; - - master = platform_get_drvdata(pdev); - sspi = spi_master_get_devdata(master); - spi_bitbang_stop(&sspi->bitbang); - clk_disable_unprepare(sspi->clk); - clk_put(sspi->clk); - dma_release_channel(sspi->rx_chan); - dma_release_channel(sspi->tx_chan); - spi_master_put(master); - return 0; -} - -#ifdef CONFIG_PM_SLEEP -static int spi_sirfsoc_suspend(struct device *dev) -{ - struct spi_master *master = dev_get_drvdata(dev); - struct sirfsoc_spi *sspi = spi_master_get_devdata(master); - int ret; - - ret = spi_master_suspend(master); - if (ret) - return ret; - - clk_disable(sspi->clk); - return 0; -} - -static int spi_sirfsoc_resume(struct device *dev) -{ - struct spi_master *master = dev_get_drvdata(dev); - struct sirfsoc_spi *sspi = spi_master_get_devdata(master); - - clk_enable(sspi->clk); - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->txfifo_op); - writel(SIRFSOC_SPI_FIFO_RESET, sspi->base + sspi->regs->rxfifo_op); - writel(SIRFSOC_SPI_FIFO_START, sspi->base + sspi->regs->txfifo_op); - writel(SIRFSOC_SPI_FIFO_START, sspi->base + sspi->regs->rxfifo_op); - return 0; -} -#endif - -static SIMPLE_DEV_PM_OPS(spi_sirfsoc_pm_ops, spi_sirfsoc_suspend, - spi_sirfsoc_resume); - -static struct platform_driver spi_sirfsoc_driver = { - .driver = { - .name = DRIVER_NAME, - .pm = &spi_sirfsoc_pm_ops, - .of_match_table = spi_sirfsoc_of_match, - }, - .probe = spi_sirfsoc_probe, - .remove = spi_sirfsoc_remove, -}; -module_platform_driver(spi_sirfsoc_driver); -MODULE_DESCRIPTION("SiRF SoC SPI master driver"); -MODULE_AUTHOR("Zhiwu Song <Zhiwu.Song@csr.com>"); -MODULE_AUTHOR("Barry Song <Baohua.Song@csr.com>"); -MODULE_AUTHOR("Qipan Li <Qipan.Li@csr.com>"); -MODULE_LICENSE("GPL v2");