[ARM] 4940/1: AT91: UDPHS driver: SAM9RL board and cpu integration.

Adds support for the USB High Speed Device Port on the AT91SAM9RL
system on chip. The AT91SAM9RL uses the same UDPHS IP as the AVR32 and
the AT91CAP9 (atmel_usba_udc driver).

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c
index 450db30..8507dd0 100644 (file)
--- a/arch/arm/mach-at91/at91sam9rl_devices.c
+++ b/arch/arm/mach-at91/at91sam9rl_devices.c
@@ -26,6 +26,101 @@
 
 
 /* --------------------------------------------------------------------
+ *  USB HS Device (Gadget)
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_USB_GADGET_ATMEL_USBA) || defined(CONFIG_USB_GADGET_ATMEL_USBA_MODULE)
+
+static struct resource usba_udc_resources[] = {
+       [0] = {
+               .start  = AT91SAM9RL_UDPHS_FIFO,
+               .end    = AT91SAM9RL_UDPHS_FIFO + SZ_512K - 1,
+               .flags  = IORESOURCE_MEM,
+       },
+       [1] = {
+               .start  = AT91SAM9RL_BASE_UDPHS,
+               .end    = AT91SAM9RL_BASE_UDPHS + SZ_1K - 1,
+               .flags  = IORESOURCE_MEM,
+       },
+       [2] = {
+               .start  = AT91SAM9RL_ID_UDPHS,
+               .end    = AT91SAM9RL_ID_UDPHS,
+               .flags  = IORESOURCE_IRQ,
+       },
+};
+
+#define EP(nam, idx, maxpkt, maxbk, dma, isoc)                 \
+       [idx] = {                                               \
+               .name           = nam,                          \
+               .index          = idx,                          \
+               .fifo_size      = maxpkt,                       \
+               .nr_banks       = maxbk,                        \
+               .can_dma        = dma,                          \
+               .can_isoc       = isoc,                         \
+       }
+
+static struct usba_ep_data usba_udc_ep[] __initdata = {
+       EP("ep0", 0, 64, 1, 0, 0),
+       EP("ep1", 1, 1024, 2, 1, 1),
+       EP("ep2", 2, 1024, 2, 1, 1),
+       EP("ep3", 3, 1024, 3, 1, 0),
+       EP("ep4", 4, 1024, 3, 1, 0),
+       EP("ep5", 5, 1024, 3, 1, 1),
+       EP("ep6", 6, 1024, 3, 1, 1),
+};
+
+#undef EP
+
+/*
+ * pdata doesn't have room for any endpoints, so we need to
+ * append room for the ones we need right after it.
+ */
+static struct {
+       struct usba_platform_data pdata;
+       struct usba_ep_data ep[7];
+} usba_udc_data;
+
+static struct platform_device at91_usba_udc_device = {
+       .name           = "atmel_usba_udc",
+       .id             = -1,
+       .dev            = {
+                               .platform_data  = &usba_udc_data.pdata,
+       },
+       .resource       = usba_udc_resources,
+       .num_resources  = ARRAY_SIZE(usba_udc_resources),
+};
+
+void __init at91_add_device_usba(struct usba_platform_data *data)
+{
+       /*
+        * Invalid pins are 0 on AT91, but the usba driver is shared
+        * with AVR32, which use negative values instead. Once/if
+        * gpio_is_valid() is ported to AT91, revisit this code.
+        */
+       usba_udc_data.pdata.vbus_pin = -EINVAL;
+       usba_udc_data.pdata.num_ep = ARRAY_SIZE(usba_udc_ep);
+       memcpy(usba_udc_data.ep, usba_udc_ep, sizeof(usba_udc_ep));;
+
+       if (data && data->vbus_pin > 0) {
+               at91_set_gpio_input(data->vbus_pin, 0);
+               at91_set_deglitch(data->vbus_pin, 1);
+               usba_udc_data.pdata.vbus_pin = data->vbus_pin;
+       }
+
+       /* Pullup pin is handled internally by USB device peripheral */
+
+       /* Clocks */
+       at91_clock_associate("utmi_clk", &at91_usba_udc_device.dev, "hclk");
+       at91_clock_associate("udphs_clk", &at91_usba_udc_device.dev, "pclk");
+
+       platform_device_register(&at91_usba_udc_device);
+}
+#else
+void __init at91_add_device_usba(struct usba_platform_data *data) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  MMC / SD
  * -------------------------------------------------------------------- */
 

diff --git a/arch/arm/mach-at91/board-sam9rlek.c b/arch/arm/mach-at91/board-sam9rlek.c
index ffc0597..b6a70fc 100644 (file)
--- a/arch/arm/mach-at91/board-sam9rlek.c
+++ b/arch/arm/mach-at91/board-sam9rlek.c
@@ -56,6 +56,14 @@ static void __init ek_init_irq(void)
 
 
 /*
+ * USB HS Device port
+ */
+static struct usba_platform_data __initdata ek_usba_udc_data = {
+       .vbus_pin       = AT91_PIN_PA8,
+};
+
+
+/*
  * MCI (SD/MMC)
  */
 static struct at91_mmc_data __initdata ek_mmc_data = {
@@ -175,6 +183,8 @@ static void __init ek_board_init(void)
 {
        /* Serial */
        at91_add_device_serial();
+       /* USB HS */
+       at91_add_device_usba(&ek_usba_udc_data);
        /* I2C */
        at91_add_device_i2c(NULL, 0);
        /* NAND */

diff --git a/arch/arm/mach-at91/clock.c b/arch/arm/mach-at91/clock.c
index b87772c..e8ce8f0 100644 (file)
--- a/arch/arm/mach-at91/clock.c
+++ b/arch/arm/mach-at91/clock.c
@@ -391,8 +391,9 @@ static int at91_clk_show(struct seq_file *s, void *unused)
        seq_printf(s, "MOR  = %8x\n", at91_sys_read(AT91_CKGR_MOR));
        seq_printf(s, "MCFR = %8x\n", at91_sys_read(AT91_CKGR_MCFR));
        seq_printf(s, "PLLA = %8x\n", at91_sys_read(AT91_CKGR_PLLAR));
-       seq_printf(s, "PLLB = %8x\n", at91_sys_read(AT91_CKGR_PLLBR));
-       if (cpu_is_at91cap9())
+       if (!cpu_is_at91sam9rl())
+               seq_printf(s, "PLLB = %8x\n", at91_sys_read(AT91_CKGR_PLLBR));
+       if (cpu_is_at91cap9() || cpu_is_at91sam9rl())
                seq_printf(s, "UCKR = %8x\n", uckr = at91_sys_read(AT91_CKGR_UCKR));
        seq_printf(s, "MCKR = %8x\n", at91_sys_read(AT91_PMC_MCKR));
        seq_printf(s, "SR   = %8x\n", sr = at91_sys_read(AT91_PMC_SR));
@@ -610,7 +611,7 @@ int __init at91_clock_init(unsigned long main_clock)
        /*
         * USB HS clock init
         */
-       if (cpu_is_at91cap9()) {
+       if (cpu_is_at91cap9() || cpu_is_at91sam9rl()) {
                /*
                 * multiplier is hard-wired to 40
                 * (obtain the USB High Speed 480 MHz when input is 12 MHz)
@@ -635,7 +636,7 @@ int __init at91_clock_init(unsigned long main_clock)
        for (i = 0; i < ARRAY_SIZE(standard_pmc_clocks); i++)
                list_add_tail(&standard_pmc_clocks[i]->node, &clocks);
 
-       if (cpu_is_at91cap9())
+       if (cpu_is_at91cap9() || cpu_is_at91sam9rl())
                list_add_tail(&utmi_clk.node, &clocks);
 
        /* MCK and CPU clock are "always on" */

diff --git a/drivers/usb/gadget/Kconfig b/drivers/usb/gadget/Kconfig
index 6e784d2..3565d43 100644 (file)
--- a/drivers/usb/gadget/Kconfig
+++ b/drivers/usb/gadget/Kconfig
@@ -118,10 +118,10 @@ config USB_AMD5536UDC
 config USB_GADGET_ATMEL_USBA
        boolean "Atmel USBA"
        select USB_GADGET_DUALSPEED
-       depends on AVR32 || ARCH_AT91CAP9
+       depends on AVR32 || ARCH_AT91CAP9 || ARCH_AT91SAM9RL
        help
          USBA is the integrated high-speed USB Device controller on
-         the AT32AP700x and AT91CAP9 processors from Atmel.
+         the AT32AP700x, some AT91SAM9 and AT91CAP9 processors from Atmel.
 
 config USB_ATMEL_USBA
        tristate

diff --git a/include/asm-arm/arch-at91/at91sam9rl.h b/include/asm-arm/arch-at91/at91sam9rl.h
index 16d2832..622e56f 100644 (file)
--- a/include/asm-arm/arch-at91/at91sam9rl.h
+++ b/include/asm-arm/arch-at91/at91sam9rl.h
@@ -110,6 +110,6 @@
 #define AT91SAM9RL_ROM_SIZE    (2 * SZ_16K)    /* Internal ROM size (32Kb) */
 
 #define AT91SAM9RL_LCDC_BASE   0x00500000      /* LCD Controller */
-#define AT91SAM9RL_UDPHS_BASE  0x00600000      /* USB Device HS controller */
+#define AT91SAM9RL_UDPHS_FIFO  0x00600000      /* USB Device HS controller */
 
 #endif