diff mbox series

[PULL,39/42] hw/arm/mps2-tz: Use the ARM SBCon two-wire serial bus interface

Message ID 20200623113904.28805-40-peter.maydell@linaro.org
State Accepted
Commit 2e34818f08d28812e8efa319a4db36668348ac9b
Headers show
Series target-arm queue | expand

Commit Message

Peter Maydell June 23, 2020, 11:39 a.m. UTC 
From: Philippe Mathieu-Daudé <f4bug@amsat.org>


From 'Application Note AN521', chapter 4.7:

  The SMM implements four SBCon serial modules:

  One SBCon module for use by the Color LCD touch interface.
  One SBCon module to configure the audio controller.
  Two general purpose SBCon modules, that connect to the
  Expansion headers J7 and J8, are intended for use with the
  V2C-Shield1 which provide an I2C interface on the headers.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

Message-id: 20200617072539.32686-15-f4bug@amsat.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

---
 hw/arm/mps2-tz.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

-- 
2.20.1
diff mbox series

Patch

diff --git a/hw/arm/mps2-tz.c b/hw/arm/mps2-tz.c
index 8155c35418d..a4fd5ddede7 100644
--- a/hw/arm/mps2-tz.c
+++ b/hw/arm/mps2-tz.c
@@ -58,6 +58,7 @@ 
 #include "hw/arm/armsse.h"
 #include "hw/dma/pl080.h"
 #include "hw/ssi/pl022.h"
+#include "hw/i2c/arm_sbcon_i2c.h"
 #include "hw/net/lan9118.h"
 #include "net/net.h"
 #include "hw/core/split-irq.h"
@@ -87,7 +88,7 @@  typedef struct {
     TZPPC ppc[5];
     TZMPC ssram_mpc[3];
     PL022State spi[5];
-    UnimplementedDeviceState i2c[4];
+    ArmSbconI2CState i2c[4];
     UnimplementedDeviceState i2s_audio;
     UnimplementedDeviceState gpio[4];
     UnimplementedDeviceState gfx;
@@ -365,6 +366,18 @@  static MemoryRegion *make_spi(MPS2TZMachineState *mms, void *opaque,
     return sysbus_mmio_get_region(s, 0);
 }
 
+static MemoryRegion *make_i2c(MPS2TZMachineState *mms, void *opaque,
+                              const char *name, hwaddr size)
+{
+    ArmSbconI2CState *i2c = opaque;
+    SysBusDevice *s;
+
+    object_initialize_child(OBJECT(mms), name, i2c, TYPE_ARM_SBCON_I2C);
+    s = SYS_BUS_DEVICE(i2c);
+    sysbus_realize(s, &error_fatal);
+    return sysbus_mmio_get_region(s, 0);
+}
+
 static void mps2tz_common_init(MachineState *machine)
 {
     MPS2TZMachineState *mms = MPS2TZ_MACHINE(machine);
@@ -499,10 +512,10 @@  static void mps2tz_common_init(MachineState *machine)
                 { "uart2", make_uart, &mms->uart[2], 0x40202000, 0x1000 },
                 { "uart3", make_uart, &mms->uart[3], 0x40203000, 0x1000 },
                 { "uart4", make_uart, &mms->uart[4], 0x40204000, 0x1000 },
-                { "i2c0", make_unimp_dev, &mms->i2c[0], 0x40207000, 0x1000 },
-                { "i2c1", make_unimp_dev, &mms->i2c[1], 0x40208000, 0x1000 },
-                { "i2c2", make_unimp_dev, &mms->i2c[2], 0x4020c000, 0x1000 },
-                { "i2c3", make_unimp_dev, &mms->i2c[3], 0x4020d000, 0x1000 },
+                { "i2c0", make_i2c, &mms->i2c[0], 0x40207000, 0x1000 },
+                { "i2c1", make_i2c, &mms->i2c[1], 0x40208000, 0x1000 },
+                { "i2c2", make_i2c, &mms->i2c[2], 0x4020c000, 0x1000 },
+                { "i2c3", make_i2c, &mms->i2c[3], 0x4020d000, 0x1000 },
             },
         }, {
             .name = "apb_ppcexp2",