summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorChris Lalancette <clalancette@gmail.com>2011-12-13 09:41:12 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2011-12-19 17:52:44 +0100
commitdf65a3fe3504930d5a89699e9903554f4605b098 (patch)
treeb3205d378f7b6af700485b7ef3bfaf985b3ba3b9
parentc005d6b193c4d98159181576c52747f92df977f2 (diff)
downloadu-boot-imx-df65a3fe3504930d5a89699e9903554f4605b098.zip
u-boot-imx-df65a3fe3504930d5a89699e9903554f4605b098.tar.gz
u-boot-imx-df65a3fe3504930d5a89699e9903554f4605b098.tar.bz2
omap4_panda: Initialize the USB phy
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>
-rw-r--r--arch/arm/include/asm/arch-omap4/clocks.h63
-rw-r--r--board/ti/panda/panda.c59
2 files changed, 122 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-omap4/clocks.h b/arch/arm/include/asm/arch-omap4/clocks.h
index c2a9b46..cd304e8 100644
--- a/arch/arm/include/asm/arch-omap4/clocks.h
+++ b/arch/arm/include/asm/arch-omap4/clocks.h
@@ -470,6 +470,47 @@ struct omap4_prcm_regs {
};
+struct omap4_scrm_regs {
+ u32 revision; /* 0x0000 */
+ u32 pad00[63];
+ u32 clksetuptime; /* 0x0100 */
+ u32 pmicsetuptime; /* 0x0104 */
+ u32 pad01[2];
+ u32 altclksrc; /* 0x0110 */
+ u32 pad02[2];
+ u32 c2cclkm; /* 0x011c */
+ u32 pad03[56];
+ u32 extclkreq; /* 0x0200 */
+ u32 accclkreq; /* 0x0204 */
+ u32 pwrreq; /* 0x0208 */
+ u32 pad04[1];
+ u32 auxclkreq0; /* 0x0210 */
+ u32 auxclkreq1; /* 0x0214 */
+ u32 auxclkreq2; /* 0x0218 */
+ u32 auxclkreq3; /* 0x021c */
+ u32 auxclkreq4; /* 0x0220 */
+ u32 auxclkreq5; /* 0x0224 */
+ u32 pad05[3];
+ u32 c2cclkreq; /* 0x0234 */
+ u32 pad06[54];
+ u32 auxclk0; /* 0x0310 */
+ u32 auxclk1; /* 0x0314 */
+ u32 auxclk2; /* 0x0318 */
+ u32 auxclk3; /* 0x031c */
+ u32 auxclk4; /* 0x0320 */
+ u32 auxclk5; /* 0x0324 */
+ u32 pad07[54];
+ u32 rsttime_reg; /* 0x0400 */
+ u32 pad08[6];
+ u32 c2crstctrl; /* 0x041c */
+ u32 extpwronrstctrl; /* 0x0420 */
+ u32 pad09[59];
+ u32 extwarmrstst_reg; /* 0x0510 */
+ u32 apewarmrstst_reg; /* 0x0514 */
+ u32 pad10[1];
+ u32 c2cwarmrstst_reg; /* 0x051C */
+};
+
/* DPLL register offsets */
#define CM_CLKMODE_DPLL 0
#define CM_IDLEST_DPLL 0x4
@@ -652,6 +693,28 @@ struct omap4_prcm_regs {
#define TPS62361_BASE_VOLT_MV 500
#define TPS62361_VSEL0_GPIO 7
+/* AUXCLKx reg fields */
+#define AUXCLK_ENABLE_MASK (1 << 8)
+#define AUXCLK_SRCSELECT_SHIFT 1
+#define AUXCLK_SRCSELECT_MASK (3 << 1)
+#define AUXCLK_CLKDIV_SHIFT 16
+#define AUXCLK_CLKDIV_MASK (0xF << 16)
+
+#define AUXCLK_SRCSELECT_SYS_CLK 0
+#define AUXCLK_SRCSELECT_CORE_DPLL 1
+#define AUXCLK_SRCSELECT_PER_DPLL 2
+#define AUXCLK_SRCSELECT_ALTERNATE 3
+
+#define AUXCLK_CLKDIV_2 1
+#define AUXCLK_CLKDIV_16 0xF
+
+/* ALTCLKSRC */
+#define ALTCLKSRC_MODE_MASK 3
+#define ALTCLKSRC_ENABLE_INT_MASK 4
+#define ALTCLKSRC_ENABLE_EXT_MASK 8
+
+#define ALTCLKSRC_MODE_ACTIVE 1
+
/* Defines for DPLL setup */
#define DPLL_LOCKED_FREQ_TOLERANCE_0 0
#define DPLL_LOCKED_FREQ_TOLERANCE_500_KHZ 500
diff --git a/board/ti/panda/panda.c b/board/ti/panda/panda.c
index b4271fb..fc8c0b4 100644
--- a/board/ti/panda/panda.c
+++ b/board/ti/panda/panda.c
@@ -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;
}