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Miller" , devicetree@vger.kernel.org, Rob Herring , linux-mmc@vger.kernel.org, =?utf-8?q?Pali_Roh=C3=A1r?= , Ulf Hansson , =?utf-8?b?SsOpcsO0bWUg?= =?utf-8?q?Pouiller?= Subject: [PATCH v4 09/24] wfx: add hwio.c/hwio.h Date: Wed, 23 Dec 2020 16:39:10 +0100 Message-Id: <20201223153925.73742-10-Jerome.Pouiller@silabs.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201223153925.73742-1-Jerome.Pouiller@silabs.com> References: <20201223153925.73742-1-Jerome.Pouiller@silabs.com> X-Originating-IP: [82.67.86.106] X-ClientProxiedBy: SA0PR12CA0024.namprd12.prod.outlook.com (2603:10b6:806:6f::29) To SN6PR11MB2718.namprd11.prod.outlook.com (2603:10b6:805:63::18) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from pc-42.silabs.com (82.67.86.106) by SA0PR12CA0024.namprd12.prod.outlook.com (2603:10b6:806:6f::29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3700.27 via Frontend Transport; Wed, 23 Dec 2020 15:40:01 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 531609d7-4d55-4aca-75f3-08d8a75903f8 X-MS-TrafficTypeDiagnostic: SA0PR11MB4543: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:561; 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X-MS-Exchange-AntiSpam-MessageData: =?utf-8?q?PVvwBkPR+is3STsfYpMEdjfqNhv?= =?utf-8?q?5084iuzuwXF9CJtCsavwRtfDY7jYNR6BZurqwmyrbjLJBmoxLSV4eavC?= =?utf-8?q?/qCM6T1fV0CPk8Bz6VqVfHgz50q2YztAaw+Rg/XGTl91GgUXSMvvdnKb?= =?utf-8?q?jxzJVphK/38y1K3HWeKQLUE25/rpjiqJmYSJH0a7qbeWcHKxFmTj1kOo?= =?utf-8?q?RJoEM876/RlTUW+3hwUoXvsm8fFVHJrABgP3N9n262ZjpwzSD19tR5VY?= =?utf-8?q?8y3WWF9X4Ga3u5mf1Zd8OCgSE/MRxDm1Opr3oh8O+Dm4NhFBiyNpifFw?= =?utf-8?q?SxQRO6N8I29fRxLJBhba4tcwiSQIOMw8DlHZBnkiyJxEYLO+bzQzrRD1?= =?utf-8?q?unR1ph0Ck8VjxOCpheGSyrWSQ1NU0SLq9Y01ov3+y2z1Zba+Q9VpqXfZ?= =?utf-8?q?d6b2bDCa3WW5Fyu5puaxlneYIUX/ThXHdRlN6NukiUB9yHAy321HY02M?= =?utf-8?q?RhCRY8KCIjX63Iw/4k1PF4onVRcTPsHZgBRo9smUpTeJAnhQxhZhiu6d?= =?utf-8?q?CMfBrJzj9v/NTkiRW776ipAtXF0g2oGjX+RchJgQQ7eNEqkOLr8OIfBp?= =?utf-8?q?JzOoEVJWZY2lRy9MoTMV1xUXd6hbYgt2s1CcL0fC3s/15OOSODm0wU7Y?= =?utf-8?q?+7XSmFwawGTfjC4hCxtR01EUuuy21i5PEXY+m99Pnb4IozXa1ShE6Q8H?= =?utf-8?q?G3FXY3wy+BkKbNe3apQMc5GkGTUy7oP9pE4foOkooxwkvMix03VU+eid?= =?utf-8?q?c9Ax8s02zaaLdaIBFCAQf6Zezqc7YO+JLHu+7ppxau7hEV8id6vtK2rO?= =?utf-8?q?0/H9PB03fwnWbXqt48UJShOnpSr/M758Gnp28vUu8p5bCAWyWoIeeLZs?= =?utf-8?q?ytIpDyYZTMtf0U9RSzNe3USrZjeVu/RSzq9XvFhLGPgiWjWCnesbdjSI?= =?utf-8?q?nZ4blRw2JXgaf9dJFEIfQoYUhLgINnBX4mF04o5XlnsLfaGLi8s+PcYV?= =?utf-8?q?QUzN3Tt7UuUmYWcrbEVYGZVkCNI4oQKtmG77luMdLzjl0?= X-OriginatorOrg: silabs.com X-MS-Exchange-CrossTenant-AuthSource: SN6PR11MB2718.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 23 Dec 2020 15:40:03.2698 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 54dbd822-5231-4b20-944d-6f4abcd541fb X-MS-Exchange-CrossTenant-Network-Message-Id: 531609d7-4d55-4aca-75f3-08d8a75903f8 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: xY0HAqEbDJSy+jhSCRgYs9rf3QjRf4XCC3HE8vmcuzq+0DR59Lj3+iMXq6daxBx92HpDAPArycogkEJyO+jnjQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR11MB4543 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Jérôme Pouiller Signed-off-by: Jérôme Pouiller --- drivers/net/wireless/silabs/wfx/hwio.c | 340 +++++++++++++++++++++++++ drivers/net/wireless/silabs/wfx/hwio.h | 79 ++++++ 2 files changed, 419 insertions(+) create mode 100644 drivers/net/wireless/silabs/wfx/hwio.c create mode 100644 drivers/net/wireless/silabs/wfx/hwio.h diff --git a/drivers/net/wireless/silabs/wfx/hwio.c b/drivers/net/wireless/silabs/wfx/hwio.c new file mode 100644 index 000000000000..393bcb1e2f4e --- /dev/null +++ b/drivers/net/wireless/silabs/wfx/hwio.c @@ -0,0 +1,340 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Low-level I/O functions. + * + * Copyright (c) 2017-2020, Silicon Laboratories, Inc. + * Copyright (c) 2010, ST-Ericsson + */ +#include +#include +#include + +#include "hwio.h" +#include "wfx.h" +#include "bus.h" +#include "traces.h" + +static int read32(struct wfx_dev *wdev, int reg, u32 *val) +{ + int ret; + __le32 *tmp = kmalloc(sizeof(u32), GFP_KERNEL); + + *val = ~0; /* Never return undefined value */ + if (!tmp) + return -ENOMEM; + ret = wdev->hwbus_ops->copy_from_io(wdev->hwbus_priv, reg, tmp, + sizeof(u32)); + if (ret >= 0) + *val = le32_to_cpu(*tmp); + kfree(tmp); + if (ret) + dev_err(wdev->dev, "%s: bus communication error: %d\n", + __func__, ret); + return ret; +} + +static int write32(struct wfx_dev *wdev, int reg, u32 val) +{ + int ret; + __le32 *tmp = kmalloc(sizeof(u32), GFP_KERNEL); + + if (!tmp) + return -ENOMEM; + *tmp = cpu_to_le32(val); + ret = wdev->hwbus_ops->copy_to_io(wdev->hwbus_priv, reg, tmp, + sizeof(u32)); + kfree(tmp); + if (ret) + dev_err(wdev->dev, "%s: bus communication error: %d\n", + __func__, ret); + return ret; +} + +static int read32_locked(struct wfx_dev *wdev, int reg, u32 *val) +{ + int ret; + + wdev->hwbus_ops->lock(wdev->hwbus_priv); + ret = read32(wdev, reg, val); + _trace_io_read32(reg, *val); + wdev->hwbus_ops->unlock(wdev->hwbus_priv); + return ret; +} + +static int write32_locked(struct wfx_dev *wdev, int reg, u32 val) +{ + int ret; + + wdev->hwbus_ops->lock(wdev->hwbus_priv); + ret = write32(wdev, reg, val); + _trace_io_write32(reg, val); + wdev->hwbus_ops->unlock(wdev->hwbus_priv); + return ret; +} + +static int write32_bits_locked(struct wfx_dev *wdev, int reg, u32 mask, u32 val) +{ + int ret; + u32 val_r, val_w; + + WARN_ON(~mask & val); + val &= mask; + wdev->hwbus_ops->lock(wdev->hwbus_priv); + ret = read32(wdev, reg, &val_r); + _trace_io_read32(reg, val_r); + if (ret < 0) + goto err; + val_w = (val_r & ~mask) | val; + if (val_w != val_r) { + ret = write32(wdev, reg, val_w); + _trace_io_write32(reg, val_w); + } +err: + wdev->hwbus_ops->unlock(wdev->hwbus_priv); + return ret; +} + +static int indirect_read(struct wfx_dev *wdev, int reg, u32 addr, + void *buf, size_t len) +{ + int ret; + int i; + u32 cfg; + u32 prefetch; + + WARN_ON(len >= 0x2000); + WARN_ON(reg != WFX_REG_AHB_DPORT && reg != WFX_REG_SRAM_DPORT); + + if (reg == WFX_REG_AHB_DPORT) + prefetch = CFG_PREFETCH_AHB; + else if (reg == WFX_REG_SRAM_DPORT) + prefetch = CFG_PREFETCH_SRAM; + else + return -ENODEV; + + ret = write32(wdev, WFX_REG_BASE_ADDR, addr); + if (ret < 0) + goto err; + + ret = read32(wdev, WFX_REG_CONFIG, &cfg); + if (ret < 0) + goto err; + + ret = write32(wdev, WFX_REG_CONFIG, cfg | prefetch); + if (ret < 0) + goto err; + + for (i = 0; i < 20; i++) { + ret = read32(wdev, WFX_REG_CONFIG, &cfg); + if (ret < 0) + goto err; + if (!(cfg & prefetch)) + break; + usleep_range(200, 250); + } + if (i == 20) { + ret = -ETIMEDOUT; + goto err; + } + + ret = wdev->hwbus_ops->copy_from_io(wdev->hwbus_priv, reg, buf, len); + +err: + if (ret < 0) + memset(buf, 0xFF, len); /* Never return undefined value */ + return ret; +} + +static int indirect_write(struct wfx_dev *wdev, int reg, u32 addr, + const void *buf, size_t len) +{ + int ret; + + WARN_ON(len >= 0x2000); + WARN_ON(reg != WFX_REG_AHB_DPORT && reg != WFX_REG_SRAM_DPORT); + ret = write32(wdev, WFX_REG_BASE_ADDR, addr); + if (ret < 0) + return ret; + + return wdev->hwbus_ops->copy_to_io(wdev->hwbus_priv, reg, buf, len); +} + +static int indirect_read_locked(struct wfx_dev *wdev, int reg, u32 addr, + void *buf, size_t len) +{ + int ret; + + wdev->hwbus_ops->lock(wdev->hwbus_priv); + ret = indirect_read(wdev, reg, addr, buf, len); + _trace_io_ind_read(reg, addr, buf, len); + wdev->hwbus_ops->unlock(wdev->hwbus_priv); + return ret; +} + +static int indirect_write_locked(struct wfx_dev *wdev, int reg, u32 addr, + const void *buf, size_t len) +{ + int ret; + + wdev->hwbus_ops->lock(wdev->hwbus_priv); + ret = indirect_write(wdev, reg, addr, buf, len); + _trace_io_ind_write(reg, addr, buf, len); + wdev->hwbus_ops->unlock(wdev->hwbus_priv); + return ret; +} + +static int indirect_read32_locked(struct wfx_dev *wdev, int reg, + u32 addr, u32 *val) +{ + int ret; + __le32 *tmp = kmalloc(sizeof(u32), GFP_KERNEL); + + if (!tmp) + return -ENOMEM; + wdev->hwbus_ops->lock(wdev->hwbus_priv); + ret = indirect_read(wdev, reg, addr, tmp, sizeof(u32)); + *val = le32_to_cpu(*tmp); + _trace_io_ind_read32(reg, addr, *val); + wdev->hwbus_ops->unlock(wdev->hwbus_priv); + kfree(tmp); + return ret; +} + +static int indirect_write32_locked(struct wfx_dev *wdev, int reg, + u32 addr, u32 val) +{ + int ret; + __le32 *tmp = kmalloc(sizeof(u32), GFP_KERNEL); + + if (!tmp) + return -ENOMEM; + *tmp = cpu_to_le32(val); + wdev->hwbus_ops->lock(wdev->hwbus_priv); + ret = indirect_write(wdev, reg, addr, tmp, sizeof(u32)); + _trace_io_ind_write32(reg, addr, val); + wdev->hwbus_ops->unlock(wdev->hwbus_priv); + kfree(tmp); + return ret; +} + +int wfx_data_read(struct wfx_dev *wdev, void *buf, size_t len) +{ + int ret; + + WARN((long)buf & 3, "%s: unaligned buffer", __func__); + wdev->hwbus_ops->lock(wdev->hwbus_priv); + ret = wdev->hwbus_ops->copy_from_io(wdev->hwbus_priv, + WFX_REG_IN_OUT_QUEUE, buf, len); + _trace_io_read(WFX_REG_IN_OUT_QUEUE, buf, len); + wdev->hwbus_ops->unlock(wdev->hwbus_priv); + if (ret) + dev_err(wdev->dev, "%s: bus communication error: %d\n", + __func__, ret); + return ret; +} + +int wfx_data_write(struct wfx_dev *wdev, const void *buf, size_t len) +{ + int ret; + + WARN((long)buf & 3, "%s: unaligned buffer", __func__); + wdev->hwbus_ops->lock(wdev->hwbus_priv); + ret = wdev->hwbus_ops->copy_to_io(wdev->hwbus_priv, + WFX_REG_IN_OUT_QUEUE, buf, len); + _trace_io_write(WFX_REG_IN_OUT_QUEUE, buf, len); + wdev->hwbus_ops->unlock(wdev->hwbus_priv); + if (ret) + dev_err(wdev->dev, "%s: bus communication error: %d\n", + __func__, ret); + return ret; +} + +int sram_buf_read(struct wfx_dev *wdev, u32 addr, void *buf, size_t len) +{ + return indirect_read_locked(wdev, WFX_REG_SRAM_DPORT, addr, buf, len); +} + +int ahb_buf_read(struct wfx_dev *wdev, u32 addr, void *buf, size_t len) +{ + return indirect_read_locked(wdev, WFX_REG_AHB_DPORT, addr, buf, len); +} + +int sram_buf_write(struct wfx_dev *wdev, u32 addr, const void *buf, size_t len) +{ + return indirect_write_locked(wdev, WFX_REG_SRAM_DPORT, addr, buf, len); +} + +int ahb_buf_write(struct wfx_dev *wdev, u32 addr, const void *buf, size_t len) +{ + return indirect_write_locked(wdev, WFX_REG_AHB_DPORT, addr, buf, len); +} + +int sram_reg_read(struct wfx_dev *wdev, u32 addr, u32 *val) +{ + return indirect_read32_locked(wdev, WFX_REG_SRAM_DPORT, addr, val); +} + +int ahb_reg_read(struct wfx_dev *wdev, u32 addr, u32 *val) +{ + return indirect_read32_locked(wdev, WFX_REG_AHB_DPORT, addr, val); +} + +int sram_reg_write(struct wfx_dev *wdev, u32 addr, u32 val) +{ + return indirect_write32_locked(wdev, WFX_REG_SRAM_DPORT, addr, val); +} + +int ahb_reg_write(struct wfx_dev *wdev, u32 addr, u32 val) +{ + return indirect_write32_locked(wdev, WFX_REG_AHB_DPORT, addr, val); +} + +int config_reg_read(struct wfx_dev *wdev, u32 *val) +{ + return read32_locked(wdev, WFX_REG_CONFIG, val); +} + +int config_reg_write(struct wfx_dev *wdev, u32 val) +{ + return write32_locked(wdev, WFX_REG_CONFIG, val); +} + +int config_reg_write_bits(struct wfx_dev *wdev, u32 mask, u32 val) +{ + return write32_bits_locked(wdev, WFX_REG_CONFIG, mask, val); +} + +int control_reg_read(struct wfx_dev *wdev, u32 *val) +{ + return read32_locked(wdev, WFX_REG_CONTROL, val); +} + +int control_reg_write(struct wfx_dev *wdev, u32 val) +{ + return write32_locked(wdev, WFX_REG_CONTROL, val); +} + +int control_reg_write_bits(struct wfx_dev *wdev, u32 mask, u32 val) +{ + return write32_bits_locked(wdev, WFX_REG_CONTROL, mask, val); +} + +int igpr_reg_read(struct wfx_dev *wdev, int index, u32 *val) +{ + int ret; + + *val = ~0; /* Never return undefined value */ + ret = write32_locked(wdev, WFX_REG_SET_GEN_R_W, IGPR_RW | index << 24); + if (ret) + return ret; + ret = read32_locked(wdev, WFX_REG_SET_GEN_R_W, val); + if (ret) + return ret; + *val &= IGPR_VALUE; + return ret; +} + +int igpr_reg_write(struct wfx_dev *wdev, int index, u32 val) +{ + return write32_locked(wdev, WFX_REG_SET_GEN_R_W, index << 24 | val); +} diff --git a/drivers/net/wireless/silabs/wfx/hwio.h b/drivers/net/wireless/silabs/wfx/hwio.h new file mode 100644 index 000000000000..20b1d7a6a7de --- /dev/null +++ b/drivers/net/wireless/silabs/wfx/hwio.h @@ -0,0 +1,79 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Low-level API. + * + * Copyright (c) 2017-2020, Silicon Laboratories, Inc. + * Copyright (c) 2010, ST-Ericsson + */ +#ifndef WFX_HWIO_H +#define WFX_HWIO_H + +#include + +struct wfx_dev; + +/* Caution: in the functions below, 'buf' will used with a DMA. So, it must be + * kmalloc'd (do not use stack allocated buffers). In doubt, enable + * CONFIG_DEBUG_SG to detect badly located buffer. + */ +int wfx_data_read(struct wfx_dev *wdev, void *buf, size_t buf_len); +int wfx_data_write(struct wfx_dev *wdev, const void *buf, size_t buf_len); + +int sram_buf_read(struct wfx_dev *wdev, u32 addr, void *buf, size_t len); +int sram_buf_write(struct wfx_dev *wdev, u32 addr, const void *buf, size_t len); + +int ahb_buf_read(struct wfx_dev *wdev, u32 addr, void *buf, size_t len); +int ahb_buf_write(struct wfx_dev *wdev, u32 addr, const void *buf, size_t len); + +int sram_reg_read(struct wfx_dev *wdev, u32 addr, u32 *val); +int sram_reg_write(struct wfx_dev *wdev, u32 addr, u32 val); + +int ahb_reg_read(struct wfx_dev *wdev, u32 addr, u32 *val); +int ahb_reg_write(struct wfx_dev *wdev, u32 addr, u32 val); + +#define CFG_ERR_SPI_FRAME 0x00000001 /* only with SPI */ +#define CFG_ERR_SDIO_BUF_MISMATCH 0x00000001 /* only with SDIO */ +#define CFG_ERR_BUF_UNDERRUN 0x00000002 +#define CFG_ERR_DATA_IN_TOO_LARGE 0x00000004 +#define CFG_ERR_HOST_NO_OUT_QUEUE 0x00000008 +#define CFG_ERR_BUF_OVERRUN 0x00000010 +#define CFG_ERR_DATA_OUT_TOO_LARGE 0x00000020 +#define CFG_ERR_HOST_NO_IN_QUEUE 0x00000040 +#define CFG_ERR_HOST_CRC_MISS 0x00000080 /* only with SDIO */ +#define CFG_SPI_IGNORE_CS 0x00000080 /* only with SPI */ +#define CFG_BYTE_ORDER_MASK 0x00000300 /* only writable with SPI */ +#define CFG_BYTE_ORDER_BADC 0x00000000 +#define CFG_BYTE_ORDER_DCBA 0x00000100 +#define CFG_BYTE_ORDER_ABCD 0x00000200 /* SDIO always use this value */ +#define CFG_DIRECT_ACCESS_MODE 0x00000400 +#define CFG_PREFETCH_AHB 0x00000800 +#define CFG_DISABLE_CPU_CLK 0x00001000 +#define CFG_PREFETCH_SRAM 0x00002000 +#define CFG_CPU_RESET 0x00004000 +#define CFG_SDIO_DISABLE_IRQ 0x00008000 /* only with SDIO */ +#define CFG_IRQ_ENABLE_DATA 0x00010000 +#define CFG_IRQ_ENABLE_WRDY 0x00020000 +#define CFG_CLK_RISE_EDGE 0x00040000 +#define CFG_SDIO_DISABLE_CRC_CHK 0x00080000 /* only with SDIO */ +#define CFG_RESERVED 0x00F00000 +#define CFG_DEVICE_ID_MAJOR 0x07000000 +#define CFG_DEVICE_ID_RESERVED 0x78000000 +#define CFG_DEVICE_ID_TYPE 0x80000000 +int config_reg_read(struct wfx_dev *wdev, u32 *val); +int config_reg_write(struct wfx_dev *wdev, u32 val); +int config_reg_write_bits(struct wfx_dev *wdev, u32 mask, u32 val); + +#define CTRL_NEXT_LEN_MASK 0x00000FFF +#define CTRL_WLAN_WAKEUP 0x00001000 +#define CTRL_WLAN_READY 0x00002000 +int control_reg_read(struct wfx_dev *wdev, u32 *val); +int control_reg_write(struct wfx_dev *wdev, u32 val); +int control_reg_write_bits(struct wfx_dev *wdev, u32 mask, u32 val); + +#define IGPR_RW 0x80000000 +#define IGPR_INDEX 0x7F000000 +#define IGPR_VALUE 0x00FFFFFF +int igpr_reg_read(struct wfx_dev *wdev, int index, u32 *val); +int igpr_reg_write(struct wfx_dev *wdev, int index, u32 val); + +#endif