[v4,4/5] ast2400: create SPI flash slaves

Commit Message

Cédric Le Goater June 27, 2016, 4:43 p.m. UTC

A set of SPI flash slaves is attached under the flash controllers of
the palmetto platform. "n25q256a" flash modules are used for the BMC
and "mx25l25635e" for the host. These types are common in the
OpenPower ecosystem.

Signed-off-by: Cédric Le Goater <[e-mail]>
---

 Changes since v3 :

 - moved memory mapping to platform initialization
 
 Changes since v2 :

 - moved the initialization of the flash modules under the palmetto
   platform
 
 hw/arm/palmetto-bmc.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

Patch

diff --git a/hw/arm/palmetto-bmc.c b/hw/arm/palmetto-bmc.c
index b8eed21348d8..54e29a865d88 100644
--- a/hw/arm/palmetto-bmc.c
+++ b/hw/arm/palmetto-bmc.c
@@ -18,6 +18,8 @@ 
 #include "hw/arm/ast2400.h"
 #include "hw/boards.h"
 #include "qemu/log.h"
+#include "sysemu/block-backend.h"
+#include "sysemu/blockdev.h"
 
 static struct arm_boot_info palmetto_bmc_binfo = {
     .loader_start = AST2400_SDRAM_BASE,
@@ -30,6 +32,32 @@  typedef struct PalmettoBMCState {
     MemoryRegion ram;
 } PalmettoBMCState;
 
+static void palmetto_bmc_init_flashes(AspeedSMCState *s, const char *flashtype,
+                                      Error **errp)
+{
+    int i ;
+
+    for (i = 0; i < s->num_cs; ++i) {
+        AspeedSMCFlash *fl = &s->flashes[i];
+        DriveInfo *dinfo = drive_get_next(IF_MTD);
+        qemu_irq cs_line;
+
+        /*
+         * FIXME: check that we are not using a flash module exceeding
+         * the controller segment size
+         */
+        fl->flash = ssi_create_slave_no_init(s->spi, flashtype);
+        if (dinfo) {
+            qdev_prop_set_drive(fl->flash, "drive", blk_by_legacy_dinfo(dinfo),
+                                errp);
+        }
+        qdev_init_nofail(fl->flash);
+
+        cs_line = qdev_get_gpio_in_named(fl->flash, SSI_GPIO_CS, 0);
+        sysbus_connect_irq(SYS_BUS_DEVICE(s), i + 1, cs_line);
+    }
+}
+
 static void palmetto_bmc_init(MachineState *machine)
 {
     PalmettoBMCState *bmc;
@@ -49,6 +77,9 @@  static void palmetto_bmc_init(MachineState *machine)
     object_property_set_bool(OBJECT(&bmc->soc), true, "realized",
                              &error_abort);
 
+    palmetto_bmc_init_flashes(&bmc->soc.smc, "n25q256a", &error_abort);
+    palmetto_bmc_init_flashes(&bmc->soc.spi, "mx25l25635e", &error_abort);
+
     palmetto_bmc_binfo.kernel_filename = machine->kernel_filename;
     palmetto_bmc_binfo.initrd_filename = machine->initrd_filename;
     palmetto_bmc_binfo.kernel_cmdline = machine->kernel_cmdline;