[PATCH] AT91 UDPHS driver: SAM9RL board and cpu integration.

From: Nicolas Ferre
Date: Mon Apr 07 2008 - 11:46:47 EST

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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@xxxxxxxxx>
---
Like AT91CAP9 patches, this cpu/board integration is generated against Linux 2.6.25-rc8 + last AT91 patches already accepted in the patch system (4902/1 to 4915/1 )
arch/arm/mach-at91/at91sam9rl_devices.c | 95 ++++++++++++++++++++++++++++++++
arch/arm/mach-at91/board-sam9rlek.c | 10 +++
arch/arm/mach-at91/clock.c | 9 +--
drivers/usb/gadget/Kconfig | 4 -
include/asm-arm/arch-at91/at91sam9rl.h | 2 5 files changed, 113 insertions(+), 7 deletions(-)

--- linux-2.6.25-rc.orig/arch/arm/mach-at91/at91sam9rl_devices.c
+++ linux-2.6.25-rc/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
* -------------------------------------------------------------------- */

--- linux-2.6.25-rc.orig/arch/arm/mach-at91/board-sam9rlek.c
+++ linux-2.6.25-rc/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 */
--- linux-2.6.25-rc.orig/arch/arm/mach-at91/clock.c
+++ linux-2.6.25-rc/arch/arm/mach-at91/clock.c
@@ -392,8 +392,9 @@ static int at91_clk_show(struct seq_file
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));
@@ -611,7 +612,7 @@ int __init at91_clock_init(unsigned long
/*
* 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)
@@ -636,7 +637,7 @@ int __init at91_clock_init(unsigned long
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" */
--- linux-2.6.25-rc.orig/drivers/usb/gadget/Kconfig
+++ linux-2.6.25-rc/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
--- linux-2.6.25-rc.orig/include/asm-arm/arch-at91/at91sam9rl.h
+++ linux-2.6.25-rc/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

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Next message: Johannes Weiner: "[patch 00/22 -v3] Generic show_mem()"
Previous message: Mark Lord: "Re: Proposed patch for IDE missing commands"
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