[PATCH 1/3 for next] AM33xx: Cleanup of lowlevel code
Teresa Gámez
t.gamez at phytec.de
Fri Aug 23 03:00:20 EDT 2013
There is a lot of duplicate lowlevel code between the
am33xx boards. Move this code to am33xx_generic and
create structs for sdram settings.
Signed-off-by: Teresa Gámez <t.gamez at phytec.de>
---
arch/arm/mach-omap/am33xx_generic.c | 166 ++++++++++++++++++++++
arch/arm/mach-omap/include/mach/am33xx-silicon.h | 45 ++++++
2 files changed, 211 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap/am33xx_generic.c b/arch/arm/mach-omap/am33xx_generic.c
index a653ef7..1b43749 100644
--- a/arch/arm/mach-omap/am33xx_generic.c
+++ b/arch/arm/mach-omap/am33xx_generic.c
@@ -171,3 +171,169 @@ static int am33xx_gpio_init(void)
return 0;
}
coredevice_initcall(am33xx_gpio_init);
+
+/* UART Defines */
+#define UART_SYSCFG_OFFSET 0x54
+#define UART_SYSSTS_OFFSET 0x58
+
+#define UART_CLK_RUNNING_MASK 0x1
+#define UART_RESET (0x1 << 1)
+#define UART_SMART_IDLE_EN (0x1 << 0x3)
+
+void am33xx_uart0_soft_reset(void)
+{
+ int reg;
+
+ reg = readl(AM33XX_UART0_BASE + UART_SYSCFG_OFFSET);
+ reg |= UART_RESET;
+ writel(reg, (AM33XX_UART0_BASE + UART_SYSCFG_OFFSET));
+ while ((readl(AM33XX_UART0_BASE + UART_SYSSTS_OFFSET) &
+ UART_CLK_RUNNING_MASK) != UART_CLK_RUNNING_MASK)
+ ;
+
+ /* Disable smart idle */
+ reg = readl((AM33XX_UART0_BASE + UART_SYSCFG_OFFSET));
+ reg |= UART_SMART_IDLE_EN;
+ writel(reg, (AM33XX_UART0_BASE + UART_SYSCFG_OFFSET))
+ ;
+}
+
+
+#define VTP_CTRL_READY (0x1 << 5)
+#define VTP_CTRL_ENABLE (0x1 << 6)
+#define VTP_CTRL_START_EN (0x1)
+
+void am33xx_config_vtp(void)
+{
+ writel(readl(AM33XX_VTP0_CTRL_REG) | VTP_CTRL_ENABLE,
+ AM33XX_VTP0_CTRL_REG);
+ writel(readl(AM33XX_VTP0_CTRL_REG) & (~VTP_CTRL_START_EN),
+ AM33XX_VTP0_CTRL_REG);
+ writel(readl(AM33XX_VTP0_CTRL_REG) | VTP_CTRL_START_EN,
+ AM33XX_VTP0_CTRL_REG);
+
+ /* Poll for READY */
+ while ((readl(AM33XX_VTP0_CTRL_REG) &
+ VTP_CTRL_READY) != VTP_CTRL_READY)
+ ;
+}
+
+void am33xx_ddr_phydata_cmd_macro(const struct am33xx_cmd_control *cmd_ctrl)
+{
+ writel(cmd_ctrl->slave_ratio0, AM33XX_CMD0_CTRL_SLAVE_RATIO_0);
+ writel(cmd_ctrl->dll_lock_diff0, AM33XX_CMD0_DLL_LOCK_DIFF_0);
+ writel(cmd_ctrl->invert_clkout0, AM33XX_CMD0_INVERT_CLKOUT_0);
+
+ writel(cmd_ctrl->slave_ratio1, AM33XX_CMD1_CTRL_SLAVE_RATIO_0);
+ writel(cmd_ctrl->dll_lock_diff1, AM33XX_CMD1_DLL_LOCK_DIFF_0);
+ writel(cmd_ctrl->invert_clkout1, AM33XX_CMD1_INVERT_CLKOUT_0);
+
+ writel(cmd_ctrl->slave_ratio2, AM33XX_CMD2_CTRL_SLAVE_RATIO_0);
+ writel(cmd_ctrl->dll_lock_diff2, AM33XX_CMD2_DLL_LOCK_DIFF_0);
+ writel(cmd_ctrl->invert_clkout2, AM33XX_CMD2_INVERT_CLKOUT_0);
+}
+
+#define CM_EMIF_SDRAM_CONFIG (AM33XX_CTRL_BASE + 0x110)
+
+void am33xx_config_sdram(const struct am33xx_emif_regs *regs)
+{
+ writel(regs->emif_read_latency, AM33XX_EMIF4_0_REG(DDR_PHY_CTRL_1));
+ writel(regs->emif_read_latency,
+ AM33XX_EMIF4_0_REG(DDR_PHY_CTRL_1_SHADOW));
+ writel(regs->emif_read_latency, AM33XX_EMIF4_0_REG(DDR_PHY_CTRL_2));
+ writel(regs->emif_tim1, AM33XX_EMIF4_0_REG(SDRAM_TIM_1));
+ writel(regs->emif_tim1, AM33XX_EMIF4_0_REG(SDRAM_TIM_1_SHADOW));
+ writel(regs->emif_tim2, AM33XX_EMIF4_0_REG(SDRAM_TIM_2));
+ writel(regs->emif_tim2, AM33XX_EMIF4_0_REG(SDRAM_TIM_2_SHADOW));
+ writel(regs->emif_tim3, AM33XX_EMIF4_0_REG(SDRAM_TIM_3));
+ writel(regs->emif_tim3, AM33XX_EMIF4_0_REG(SDRAM_TIM_3_SHADOW));
+
+ if (regs->zq_config) {
+ /*
+ * A value of 0x2800 for the REF CTRL will give us
+ * about 570us for a delay, which will be long enough
+ * to configure things.
+ */
+ writel(0x2800, AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL));
+ writel(regs->zq_config, AM33XX_EMIF4_0_REG(ZQ_CONFIG));
+ writel(regs->sdram_config, CM_EMIF_SDRAM_CONFIG);
+ writel(regs->sdram_config, AM33XX_EMIF4_0_REG(SDRAM_CONFIG));
+ writel(regs->sdram_ref_ctrl,
+ AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL));
+ writel(regs->sdram_ref_ctrl,
+ AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL_SHADOW));
+
+ }
+
+ writel(regs->sdram_ref_ctrl,
+ AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL));
+ writel(regs->sdram_ref_ctrl,
+ AM33XX_EMIF4_0_REG(SDRAM_REF_CTRL_SHADOW));
+ writel(regs->sdram_config, CM_EMIF_SDRAM_CONFIG);
+}
+
+void am33xx_config_io_ctrl(int ioctrl)
+{
+ writel(ioctrl, AM33XX_DDR_CMD0_IOCTRL);
+ writel(ioctrl, AM33XX_DDR_CMD1_IOCTRL);
+ writel(ioctrl, AM33XX_DDR_CMD2_IOCTRL);
+ writel(ioctrl, AM33XX_DDR_DATA0_IOCTRL);
+ writel(ioctrl, AM33XX_DDR_DATA1_IOCTRL);
+}
+
+void am33xx_config_ddr_data(const struct am33xx_ddr_data *data, int macronr)
+{
+ u32 base = 0x0;
+
+ if (macronr)
+ base = 0xA4;
+
+ writel(data->rd_slave_ratio0,
+ (AM33XX_DATA0_RD_DQS_SLAVE_RATIO_0 + base));
+ writel(data->wr_dqs_slave_ratio0,
+ (AM33XX_DATA0_WR_DQS_SLAVE_RATIO_0 + base));
+ writel(data->wrlvl_init_ratio0,
+ (AM33XX_DATA0_WRLVL_INIT_RATIO_0 + base));
+ writel(data->gatelvl_init_ratio0,
+ (AM33XX_DATA0_GATELVL_INIT_RATIO_0 + base));
+ writel(data->fifo_we_slave_ratio0,
+ (AM33XX_DATA0_FIFO_WE_SLAVE_RATIO_0 + base));
+ writel(data->wr_slave_ratio0,
+ (AM33XX_DATA0_WR_DATA_SLAVE_RATIO_0 + base));
+ writel(data->use_rank0_delay,
+ (AM33XX_DATA0_RANK0_DELAYS_0 + base));
+ writel(data->dll_lock_diff0,
+ (AM33XX_DATA0_DLL_LOCK_DIFF_0 + base));
+}
+
+void am335x_sdram_init(int mpupll_M, int osc, int ioctrl,
+ const struct am33xx_cmd_control *cmd_ctrl,
+ const struct am33xx_emif_regs *emif_regs,
+ const struct am33xx_ddr_data *ddr_data)
+{
+ /* Dont reconfigure SDRAM while running in SDRAM! */
+ if (running_in_sdram())
+ return;
+
+ /* Setup the PLLs and the clocks for the peripherals */
+ pll_init(mpupll_M, osc);
+
+ enable_ddr_clocks();
+
+ am33xx_config_vtp();
+
+ am33xx_ddr_phydata_cmd_macro(cmd_ctrl);
+ am33xx_config_ddr_data(ddr_data, 0);
+ am33xx_config_ddr_data(ddr_data, 1);
+
+ am33xx_config_io_ctrl(ioctrl);
+
+ writel(readl(AM33XX_DDR_IO_CTRL) &
+ 0xefffffff, AM33XX_DDR_IO_CTRL);
+ writel(readl(AM33XX_DDR_CKE_CTRL) |
+ 0x00000001, AM33XX_DDR_CKE_CTRL);
+
+ am33xx_config_sdram(emif_regs);
+
+ am33xx_uart0_soft_reset();
+}
diff --git a/arch/arm/mach-omap/include/mach/am33xx-silicon.h b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
index bd55da4..c6d7178 100644
--- a/arch/arm/mach-omap/include/mach/am33xx-silicon.h
+++ b/arch/arm/mach-omap/include/mach/am33xx-silicon.h
@@ -191,4 +191,49 @@
#define AM33XX_MAC_ID1_HI (AM33XX_CTRL_BASE + 0x63c)
#define AM33XX_MAC_MII_SEL (AM33XX_CTRL_BASE + 0x650)
+struct am33xx_cmd_control {
+ u32 slave_ratio0;
+ u32 dll_lock_diff0;
+ u32 invert_clkout0;
+ u32 slave_ratio1;
+ u32 dll_lock_diff1;
+ u32 invert_clkout1;
+ u32 slave_ratio2;
+ u32 dll_lock_diff2;
+ u32 invert_clkout2;
+};
+
+struct am33xx_emif_regs {
+ u32 emif_read_latency;
+ u32 emif_tim1;
+ u32 emif_tim2;
+ u32 emif_tim3;
+ u32 sdram_config;
+ u32 sdram_config2;
+ u32 zq_config;
+ u32 sdram_ref_ctrl;
+};
+
+struct am33xx_ddr_data {
+ u32 rd_slave_ratio0;
+ u32 wr_dqs_slave_ratio0;
+ u32 wrlvl_init_ratio0;
+ u32 gatelvl_init_ratio0;
+ u32 fifo_we_slave_ratio0;
+ u32 wr_slave_ratio0;
+ u32 use_rank0_delay;
+ u32 dll_lock_diff0;
+};
+
+void am33xx_uart0_soft_reset(void);
+void am33xx_config_vtp(void);
+void am33xx_ddr_phydata_cmd_macro(const struct am33xx_cmd_control *cmd_ctrl);
+void am33xx_config_io_ctrl(int ioctrl);
+void am33xx_config_sdram(const struct am33xx_emif_regs *regs);
+void am33xx_config_ddr_data(const struct am33xx_ddr_data *data, int macronr);
+void am335x_sdram_init(int mpupll_M, int osc, int ioctrl,
+ const struct am33xx_cmd_control *cmd_ctrl,
+ const struct am33xx_emif_regs *emif_regs,
+ const struct am33xx_ddr_data *ddr_data);
+
#endif
--
1.7.0.4
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