ssi code

4 files changed, 195 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile
index d4f671547c37..ace860ded36f 100644
--- a/arch/arm/mach-omap2/Makefile
+++ b/arch/arm/mach-omap2/Makefile
@@ -222,6 +222,10 @@ ifneq ($(CONFIG_DRM_OMAP),)
 obj-y					+= drm.o
 endif
 
+# Synchronous Serial Interface (SSI)
+omap-ssi-$(CONFIG_OMAP_SSI)		:= ssi.o
+obj-y					+= $(omap-ssi-m) $(omap-ssi-y)
+
 # Specific board support
 obj-$(CONFIG_MACH_OMAP_GENERIC)		+= board-generic.o
 obj-$(CONFIG_MACH_OMAP_H4)		+= board-h4.o
diff --git a/arch/arm/mach-omap2/board-rx51-peripherals.c b/arch/arm/mach-omap2/board-rx51-peripherals.c
index 9c2dd102fbbb..e870a4ea5233 100644
--- a/arch/arm/mach-omap2/board-rx51-peripherals.c
+++ b/arch/arm/mach-omap2/board-rx51-peripherals.c
@@ -27,6 +27,7 @@
 #include <linux/power/isp1704_charger.h>
 #include <linux/platform_data/spi-omap2-mcspi.h>
 #include <linux/platform_data/mtd-onenand-omap2.h>
+#include <linux/platform_data/hsi-omap-ssi.h>
 
 #include <asm/system_info.h>
 
@@ -73,6 +74,8 @@
 #define LIS302_IRQ1_GPIO 181
 #define LIS302_IRQ2_GPIO 180  /* Not yet in use */
 
+#define RX51_CAWAKE_GPIO 151
+
 /* List all SPI devices here. Note that the list/probe order seems to matter! */
 enum {
 	RX51_SPI_WL1251,
@@ -265,6 +268,11 @@ static struct spi_board_info rx51_peripherals_spi_board_info[] __initdata = {
 	},
 };
 
+static struct omap_ssi_board_config ssi_board_config = {
+	.num_ports = 1,
+	.cawake_gpio = { RX51_CAWAKE_GPIO },
+};
+
 static struct platform_device rx51_battery_device = {
 	.name	= "rx51-battery",
 	.id	= -1,
@@ -1295,6 +1303,7 @@ void __init rx51_peripherals_init(void)
 	if (partition)
 		omap_hsmmc_init(mmc);
 
+	omap_ssi_config(&ssi_board_config);
 	rx51_charger_init();
 	rx51_init_twl4030_hwmon();
 }
diff --git a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
index 0c3a427da544..d6d365a6e3da 100644
--- a/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_3xxx_data.c
@@ -3693,6 +3693,109 @@ static struct omap_hwmod_ocp_if omap3xxx_l4_core__aes = {
 	.user		= OCP_USER_MPU | OCP_USER_SDMA,
 };
 
+/*
+ * 'ssi' class
+ * synchronous serial interface (multichannel and full-duplex serial if)
+ */
+
+static struct omap_hwmod_class_sysconfig omap34xx_ssi_sysc = {
+	.rev_offs       = 0x0000,
+	.sysc_offs      = 0x0010,
+	.syss_offs      = 0x0014,
+	.sysc_flags     = (SYSC_HAS_AUTOIDLE | SYSC_HAS_EMUFREE |
+	                   SYSC_HAS_MIDLEMODE | SYSC_HAS_SIDLEMODE |
+	                   SYSC_HAS_SOFTRESET | SYSS_HAS_RESET_STATUS),
+	.idlemodes      = (SIDLE_FORCE | SIDLE_NO | SIDLE_SMART |
+	                   SIDLE_SMART_WKUP | MSTANDBY_FORCE | MSTANDBY_NO |
+	                   MSTANDBY_SMART | MSTANDBY_SMART_WKUP),
+	.sysc_fields    = &omap_hwmod_sysc_type1,
+};
+
+static struct omap_hwmod_class omap34xx_ssi_hwmod_class = {
+	.name   = "ssi",
+	.sysc   = &omap34xx_ssi_sysc,
+};
+
+static struct omap_hwmod_irq_info omap34xx_ssi_irqs[] = {
+	{ .name = "ssi_p1_mpu_irq0", .irq = 67 },
+	{ .name = "ssi_p1_mpu_irq1", .irq = 68 },
+	{ .name = "ssi_p2_mpu_irq0", .irq = 69 },
+	{ .name = "ssi_p2_mpu_irq1", .irq = 70 },
+	{ .name = "ssi_gdd_mpu",     .irq = 71 },
+	{ .irq = -1 },
+};
+
+static struct omap_hwmod_addr_space omap34xx_ssi_addrs[] = {
+	{
+		.name           = "sys",
+		.pa_start       = 0x48058000,
+		.pa_end         = 0x48058fff,
+		.flags          = ADDR_TYPE_RT,
+	},
+	{
+		/* generic distributed DMA */
+		.name           = "gdd",
+		.pa_start       = 0x48059000,
+		.pa_end         = 0x48059fff,
+		.flags          = ADDR_TYPE_RT,
+	},
+	{
+		/* port 1: synchronous serial transmitter */
+		.name           = "p1_sst",
+		.pa_start       = 0x4805a000,
+		.pa_end         = 0x4805a7ff,
+		.flags          = ADDR_TYPE_RT,
+	},
+	{
+		/* port 1: synchronous serial receiver */
+		.name           = "p1_ssr",
+		.pa_start       = 0x4805a800,
+		.pa_end         = 0x4805afff,
+		.flags          = ADDR_TYPE_RT,
+	},
+	{
+		/* port 2: synchronous serial transmitter */
+		.name           = "p2_sst",
+		.pa_start       = 0x4805b000,
+		.pa_end         = 0x4805b7ff,
+		.flags          = ADDR_TYPE_RT,
+	},
+	{
+		/* port 2: synchronous serial receiver */
+		.name           = "p2_ssr",
+		.pa_start       = 0x4805b800,
+		.pa_end         = 0x4805bfff,
+		.flags          = ADDR_TYPE_RT,
+	},
+	{}
+};
+
+static struct omap_hwmod omap34xx_ssi_hwmod = {
+	.name		= "ssi",
+	.class		= &omap34xx_ssi_hwmod_class,
+	.clkdm_name	= "l3_init_clkdm",
+	.mpu_irqs	= omap34xx_ssi_irqs,
+	.main_clk	= "ssi_ssr_fck",
+	.prcm		= {
+		.omap2 = {
+			.prcm_reg_id     = 1,
+			.module_bit      = OMAP3430_EN_SSI_SHIFT,
+			.module_offs     = WKUP_MOD,
+			.idlest_reg_id   = 1,
+			.idlest_idle_bit = OMAP3430ES2_ST_SSI_IDLE_SHIFT,
+		},
+	},
+};
+
+/* SSI -> l3 */
+static struct omap_hwmod_ocp_if omap34xx_l3__ssi = {
+	.master		= &omap34xx_ssi_hwmod,
+	.slave		= &omap3xxx_l3_main_hwmod,
+	.clk		= "ssi_ick",
+	.addr		= omap34xx_ssi_addrs,
+	.user		= OCP_USER_MPU | OCP_USER_SDMA,
+};
+
 static struct omap_hwmod_ocp_if *omap3xxx_hwmod_ocp_ifs[] __initdata = {
 	&omap3xxx_l3_main__l4_core,
 	&omap3xxx_l3_main__l4_per,
@@ -3818,6 +3921,7 @@ static struct omap_hwmod_ocp_if *omap34xx_hwmod_ocp_ifs[] __initdata = {
 #ifdef CONFIG_OMAP_IOMMU_IVA2
 	&omap3xxx_l3_main__mmu_iva,
 #endif
+	&omap34xx_l3__ssi,
 	NULL
 };
 
diff --git a/arch/arm/mach-omap2/ssi.c b/arch/arm/mach-omap2/ssi.c
new file mode 100644
index 000000000000..adf342dd20c7
--- /dev/null
+++ b/arch/arm/mach-omap2/ssi.c
@@ -0,0 +1,78 @@
+/*
+ * linux/arch/arm/mach-omap2/ssi.c
+ *
+ * Copyright (C) 2010 Nokia Corporation. All rights reserved.
+ *
+ * Contact: Carlos Chinea <carlos.chinea@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/hsi-omap-ssi.h>
+#include "omap-pm.h"
+
+static struct omap_ssi_platform_data ssi_pdata = {
+	.num_ports      = SSI_NUM_PORTS,
+	.cawake_gpio    = {0},
+	.get_dev_context_loss_count  = omap_pm_get_dev_context_loss_count,
+};
+
+static struct platform_device ssi_pdev = {
+	.name    = "omap_ssi",
+	.id    = 0,
+	.dev    = {
+		.platform_data  = &ssi_pdata,
+	},
+};
+
+int __init omap_ssi_config(struct omap_ssi_board_config *ssi_config)
+{
+	unsigned int port, offset, cawake_gpio;
+	int err;
+
+	ssi_pdata.num_ports = ssi_config->num_ports;
+
+	for (port = 0, offset = 7; port < ssi_config->num_ports; port++, offset += 5) {
+		cawake_gpio = ssi_config->cawake_gpio[port];
+		if (!cawake_gpio)
+			continue; /* Nothing to do */
+		err = gpio_request(cawake_gpio, "cawake");
+		if (err < 0)
+			goto rback;
+		gpio_direction_input(cawake_gpio);
+
+		ssi_pdata.cawake_gpio[port] = ssi_config->cawake_gpio[port];
+	}
+
+	return 0;
+
+rback:
+	dev_err(&ssi_pdev.dev, "Request cawake (gpio%d) failed\n", cawake_gpio);
+	while (port > 0)
+		gpio_free(ssi_config->cawake_gpio[--port]);
+
+	return err;
+}
+
+static int __init ssi_init(void)
+{
+	return platform_device_register(&ssi_pdev);
+}
+subsys_initcall(ssi_init);