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omap4_panda: Initialize the USB phy

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During misc_init_r, make sure to setup the clocks
properly for the USB hub on the pandaboard.  With
this in place, the USB hub and the ethernet works
on the pandaboard.

Signed-off-by: Chris Lalancette <clalancette@gmail.com>
Acked-by: Aneesh V <aneesh@ti.com>
This commit is contained in:
Chris Lalancette
2011-12-13 09:41:12 +00:00
committed by Albert ARIBAUD
parent c005d6b193
commit df65a3fe35
2 changed files with 122 additions and 0 deletions
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59
board/ti/panda/panda.c
View File

@@ -24,15 +24,21 @@
#include <common.h>
#include <asm/arch/sys_proto.h>
#include <asm/arch/mmc_host_def.h>
#include <asm/arch/clocks.h>
#include <asm/arch/gpio.h>
#include "panda_mux_data.h"
#define PANDA_ULPI_PHY_TYPE_GPIO 182
DECLARE_GLOBAL_DATA_PTR;
const struct omap_sysinfo sysinfo = {
"Board: OMAP4 Panda\n"
};
struct omap4_scrm_regs *const scrm = (struct omap4_scrm_regs *)0x4a30a000;
/**
* @brief board_init
*
@@ -62,6 +68,59 @@ int board_eth_init(bd_t *bis)
*/
int misc_init_r(void)
{
int phy_type;
u32 auxclk, altclksrc;
/* EHCI is not supported on ES1.0 */
if (omap_revision() == OMAP4430_ES1_0)
return 0;
gpio_direction_input(PANDA_ULPI_PHY_TYPE_GPIO);
phy_type = gpio_get_value(PANDA_ULPI_PHY_TYPE_GPIO);
if (phy_type == 1) {
/* ULPI PHY supplied by auxclk3 derived from sys_clk */
debug("ULPI PHY supplied by auxclk3\n");
auxclk = readl(&scrm->auxclk3);
/* Select sys_clk */
auxclk &= ~AUXCLK_SRCSELECT_MASK;
auxclk |= AUXCLK_SRCSELECT_SYS_CLK << AUXCLK_SRCSELECT_SHIFT;
/* Set the divisor to 2 */
auxclk &= ~AUXCLK_CLKDIV_MASK;
auxclk |= AUXCLK_CLKDIV_2 << AUXCLK_CLKDIV_SHIFT;
/* Request auxilary clock #3 */
auxclk |= AUXCLK_ENABLE_MASK;
writel(auxclk, &scrm->auxclk3);
} else {
/* ULPI PHY supplied by auxclk1 derived from PER dpll */
debug("ULPI PHY supplied by auxclk1\n");
auxclk = readl(&scrm->auxclk1);
/* Select per DPLL */
auxclk &= ~AUXCLK_SRCSELECT_MASK;
auxclk |= AUXCLK_SRCSELECT_PER_DPLL << AUXCLK_SRCSELECT_SHIFT;
/* Set the divisor to 16 */
auxclk &= ~AUXCLK_CLKDIV_MASK;
auxclk |= AUXCLK_CLKDIV_16 << AUXCLK_CLKDIV_SHIFT;
/* Request auxilary clock #3 */
auxclk |= AUXCLK_ENABLE_MASK;
writel(auxclk, &scrm->auxclk1);
}
altclksrc = readl(&scrm->altclksrc);
/* Activate alternate system clock supplier */
altclksrc &= ~ALTCLKSRC_MODE_MASK;
altclksrc |= ALTCLKSRC_MODE_ACTIVE;
/* enable clocks */
altclksrc |= ALTCLKSRC_ENABLE_INT_MASK | ALTCLKSRC_ENABLE_EXT_MASK;
writel(altclksrc, &scrm->altclksrc);
return 0;
}