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-rw-r--r--arch/arm/mach-davinci/board-dm365-evm.c263
1 files changed, 253 insertions, 10 deletions
diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c
index 3675e844b9b1..a1d5e7dac741 100644
--- a/arch/arm/mach-davinci/board-dm365-evm.c
+++ b/arch/arm/mach-davinci/board-dm365-evm.c
@@ -20,6 +20,7 @@
#include <linux/io.h>
#include <linux/clk.h>
#include <linux/i2c/at24.h>
+#include <linux/leds.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/nand.h>
@@ -33,18 +34,71 @@
#include <mach/psc.h>
#include <mach/common.h>
#include <mach/i2c.h>
-#include <linux/i2c.h>
#include <mach/serial.h>
#include <mach/common.h>
#include <mach/mmc.h>
#include <mach/nand.h>
+
+static inline int have_imager(void)
+{
+ /* REVISIT when it's supported, trigger via Kconfig */
+ return 0;
+}
+
+static inline int have_tvp7002(void)
+{
+ /* REVISIT when it's supported, trigger via Kconfig */
+ return 0;
+}
+
+
#define DM365_ASYNC_EMIF_CONTROL_BASE 0x01d10000
#define DM365_ASYNC_EMIF_DATA_CE0_BASE 0x02000000
+#define DM365_ASYNC_EMIF_DATA_CE1_BASE 0x04000000
#define DM365_EVM_PHY_MASK (0x2)
#define DM365_EVM_MDIO_FREQUENCY (2200000) /* PHY bus frequency */
+/*
+ * A MAX-II CPLD is used for various board control functions.
+ */
+#define CPLD_OFFSET(a13a8,a2a1) (((a13a8) << 10) + ((a2a1) << 3))
+
+#define CPLD_VERSION CPLD_OFFSET(0,0) /* r/o */
+#define CPLD_TEST CPLD_OFFSET(0,1)
+#define CPLD_LEDS CPLD_OFFSET(0,2)
+#define CPLD_MUX CPLD_OFFSET(0,3)
+#define CPLD_SWITCH CPLD_OFFSET(1,0) /* r/o */
+#define CPLD_POWER CPLD_OFFSET(1,1)
+#define CPLD_VIDEO CPLD_OFFSET(1,2)
+#define CPLD_CARDSTAT CPLD_OFFSET(1,3) /* r/o */
+
+#define CPLD_DILC_OUT CPLD_OFFSET(2,0)
+#define CPLD_DILC_IN CPLD_OFFSET(2,1) /* r/o */
+
+#define CPLD_IMG_DIR0 CPLD_OFFSET(2,2)
+#define CPLD_IMG_MUX0 CPLD_OFFSET(2,3)
+#define CPLD_IMG_MUX1 CPLD_OFFSET(3,0)
+#define CPLD_IMG_DIR1 CPLD_OFFSET(3,1)
+#define CPLD_IMG_MUX2 CPLD_OFFSET(3,2)
+#define CPLD_IMG_MUX3 CPLD_OFFSET(3,3)
+#define CPLD_IMG_DIR2 CPLD_OFFSET(4,0)
+#define CPLD_IMG_MUX4 CPLD_OFFSET(4,1)
+#define CPLD_IMG_MUX5 CPLD_OFFSET(4,2)
+
+#define CPLD_RESETS CPLD_OFFSET(4,3)
+
+#define CPLD_CCD_DIR1 CPLD_OFFSET(0x3e,0)
+#define CPLD_CCD_IO1 CPLD_OFFSET(0x3e,1)
+#define CPLD_CCD_DIR2 CPLD_OFFSET(0x3e,2)
+#define CPLD_CCD_IO2 CPLD_OFFSET(0x3e,3)
+#define CPLD_CCD_DIR3 CPLD_OFFSET(0x3f,0)
+#define CPLD_CCD_IO3 CPLD_OFFSET(0x3f,1)
+
+static void __iomem *cpld;
+
+
/* NOTE: this is geared for the standard config, with a socketed
* 2 GByte Micron NAND (MT29F16G08FAA) using 128KB sectors. If you
* swap chips with a different block size, partitioning will
@@ -135,7 +189,27 @@ static struct davinci_i2c_platform_data i2c_pdata = {
.bus_delay = 0 /* usec */,
};
+static int cpld_mmc_get_cd(int module)
+{
+ if (!cpld)
+ return -ENXIO;
+
+ /* low == card present */
+ return !(__raw_readb(cpld + CPLD_CARDSTAT) & BIT(module ? 4 : 0));
+}
+
+static int cpld_mmc_get_ro(int module)
+{
+ if (!cpld)
+ return -ENXIO;
+
+ /* high == card's write protect switch active */
+ return !!(__raw_readb(cpld + CPLD_CARDSTAT) & BIT(module ? 5 : 1));
+}
+
static struct davinci_mmc_config dm365evm_mmc_config = {
+ .get_cd = cpld_mmc_get_cd,
+ .get_ro = cpld_mmc_get_ro,
.wires = 4,
.max_freq = 50000000,
.caps = MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED,
@@ -199,10 +273,185 @@ static void __init evm_init_i2c(void)
i2c_register_board_info(1, i2c_info, ARRAY_SIZE(i2c_info));
}
-static struct platform_device *dm365_evm_devices[] __initdata = {
+static struct platform_device *dm365_evm_nand_devices[] __initdata = {
&davinci_nand_device,
};
+static inline int have_leds(void)
+{
+#ifdef CONFIG_LEDS_CLASS
+ return 1;
+#else
+ return 0;
+#endif
+}
+
+struct cpld_led {
+ struct led_classdev cdev;
+ u8 mask;
+};
+
+static const struct {
+ const char *name;
+ const char *trigger;
+} cpld_leds[] = {
+ { "dm365evm::ds2", },
+ { "dm365evm::ds3", },
+ { "dm365evm::ds4", },
+ { "dm365evm::ds5", },
+ { "dm365evm::ds6", "nand-disk", },
+ { "dm365evm::ds7", "mmc1", },
+ { "dm365evm::ds8", "mmc0", },
+ { "dm365evm::ds9", "heartbeat", },
+};
+
+static void cpld_led_set(struct led_classdev *cdev, enum led_brightness b)
+{
+ struct cpld_led *led = container_of(cdev, struct cpld_led, cdev);
+ u8 reg = __raw_readb(cpld + CPLD_LEDS);
+
+ if (b != LED_OFF)
+ reg &= ~led->mask;
+ else
+ reg |= led->mask;
+ __raw_writeb(reg, cpld + CPLD_LEDS);
+}
+
+static enum led_brightness cpld_led_get(struct led_classdev *cdev)
+{
+ struct cpld_led *led = container_of(cdev, struct cpld_led, cdev);
+ u8 reg = __raw_readb(cpld + CPLD_LEDS);
+
+ return (reg & led->mask) ? LED_OFF : LED_FULL;
+}
+
+static int __init cpld_leds_init(void)
+{
+ int i;
+
+ if (!have_leds() || !cpld)
+ return 0;
+
+ /* setup LEDs */
+ __raw_writeb(0xff, cpld + CPLD_LEDS);
+ for (i = 0; i < ARRAY_SIZE(cpld_leds); i++) {
+ struct cpld_led *led;
+
+ led = kzalloc(sizeof(*led), GFP_KERNEL);
+ if (!led)
+ break;
+
+ led->cdev.name = cpld_leds[i].name;
+ led->cdev.brightness_set = cpld_led_set;
+ led->cdev.brightness_get = cpld_led_get;
+ led->cdev.default_trigger = cpld_leds[i].trigger;
+ led->mask = BIT(i);
+
+ if (led_classdev_register(NULL, &led->cdev) < 0) {
+ kfree(led);
+ break;
+ }
+ }
+
+ return 0;
+}
+/* run after subsys_initcall() for LEDs */
+fs_initcall(cpld_leds_init);
+
+
+static void __init evm_init_cpld(void)
+{
+ u8 mux, resets;
+ const char *label;
+ struct clk *aemif_clk;
+
+ /* Make sure we can configure the CPLD through CS1. Then
+ * leave it on for later access to MMC and LED registers.
+ */
+ aemif_clk = clk_get(NULL, "aemif");
+ if (IS_ERR(aemif_clk))
+ return;
+ clk_enable(aemif_clk);
+
+ if (request_mem_region(DM365_ASYNC_EMIF_DATA_CE1_BASE, SECTION_SIZE,
+ "cpld") == NULL)
+ goto fail;
+ cpld = ioremap(DM365_ASYNC_EMIF_DATA_CE1_BASE, SECTION_SIZE);
+ if (!cpld) {
+ release_mem_region(DM365_ASYNC_EMIF_DATA_CE1_BASE,
+ SECTION_SIZE);
+fail:
+ pr_err("ERROR: can't map CPLD\n");
+ clk_disable(aemif_clk);
+ return;
+ }
+
+ /* External muxing for some signals */
+ mux = 0;
+
+ /* Read SW5 to set up NAND + keypad _or_ OneNAND (sync read).
+ * NOTE: SW4 bus width setting must match!
+ */
+ if ((__raw_readb(cpld + CPLD_SWITCH) & BIT(5)) == 0) {
+ /* external keypad mux */
+ mux |= BIT(7);
+
+ platform_add_devices(dm365_evm_nand_devices,
+ ARRAY_SIZE(dm365_evm_nand_devices));
+ } else {
+ /* no OneNAND support yet */
+ }
+
+ /* Leave external chips in reset when unused. */
+ resets = BIT(3) | BIT(2) | BIT(1) | BIT(0);
+
+ /* Static video input config with SN74CBT16214 1-of-3 mux:
+ * - port b1 == tvp7002 (mux lowbits == 1 or 6)
+ * - port b2 == imager (mux lowbits == 2 or 7)
+ * - port b3 == tvp5146 (mux lowbits == 5)
+ *
+ * Runtime switching could work too, with limitations.
+ */
+ if (have_imager()) {
+ label = "HD imager";
+ mux |= 1;
+
+ /* externally mux MMC1/ENET/AIC33 to imager */
+ mux |= BIT(6) | BIT(5) | BIT(3);
+ } else {
+ struct davinci_soc_info *soc_info = &davinci_soc_info;
+
+ /* we can use MMC1 ... */
+ dm365evm_mmc_configure();
+ davinci_setup_mmc(1, &dm365evm_mmc_config);
+
+ /* ... and ENET ... */
+ dm365evm_emac_configure();
+ soc_info->emac_pdata->phy_mask = DM365_EVM_PHY_MASK;
+ soc_info->emac_pdata->mdio_max_freq = DM365_EVM_MDIO_FREQUENCY;
+ resets &= ~BIT(3);
+
+ /* ... and AIC33 */
+ resets &= ~BIT(1);
+
+ if (have_tvp7002()) {
+ mux |= 2;
+ resets &= ~BIT(2);
+ label = "tvp7002 HD";
+ } else {
+ /* default to tvp5146 */
+ mux |= 5;
+ resets &= ~BIT(0);
+ label = "tvp5146 SD";
+ }
+ }
+ __raw_writeb(mux, cpld + CPLD_MUX);
+ __raw_writeb(resets, cpld + CPLD_RESETS);
+ pr_info("EVM: %s video input\n", label);
+
+ /* REVISIT export switches: NTSC/PAL (SW5.6), EXTRA1 (SW5.2), etc */
+}
+
static struct davinci_uart_config uart_config __initdata = {
.enabled_uarts = (1 << 0),
};
@@ -214,11 +463,6 @@ static void __init dm365_evm_map_io(void)
static __init void dm365_evm_init(void)
{
- struct davinci_soc_info *soc_info = &davinci_soc_info;
-
- platform_add_devices(dm365_evm_devices,
- ARRAY_SIZE(dm365_evm_devices));
-
evm_init_i2c();
davinci_serial_init(&uart_config);
@@ -226,10 +470,9 @@ static __init void dm365_evm_init(void)
dm365evm_mmc_configure();
davinci_setup_mmc(0, &dm365evm_mmc_config);
- davinci_setup_mmc(1, &dm365evm_mmc_config);
- soc_info->emac_pdata->phy_mask = DM365_EVM_PHY_MASK;
- soc_info->emac_pdata->mdio_max_freq = DM365_EVM_MDIO_FREQUENCY;
+ /* maybe setup mmc1/etc ... _after_ mmc0 */
+ evm_init_cpld();
}
static __init void dm365_evm_irq_init(void)
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