diff options
Diffstat (limited to 'arch/arm/mach-omap2/control.c')
| -rw-r--r-- | arch/arm/mach-omap2/control.c | 111 |
1 files changed, 90 insertions, 21 deletions
diff --git a/arch/arm/mach-omap2/control.c b/arch/arm/mach-omap2/control.c index 0269bb055b6..69527941902 100644 --- a/arch/arm/mach-omap2/control.c +++ b/arch/arm/mach-omap2/control.c @@ -20,12 +20,16 @@ #include "cm-regbits-34xx.h" #include "prm-regbits-34xx.h" -#include "cm.h" -#include "prm.h" +#include "prm2xxx_3xxx.h" +#include "cm2xxx_3xxx.h" #include "sdrc.h" #include "pm.h" #include "control.h" +/* Used by omap3_ctrl_save_padconf() */ +#define START_PADCONF_SAVE 0x2 +#define PADCONF_SAVE_DONE 0x1 + static void __iomem *omap2_ctrl_base; static void __iomem *omap4_ctrl_pad_base; @@ -134,6 +138,7 @@ struct omap3_control_regs { u32 sramldo4; u32 sramldo5; u32 csi; + u32 padconf_sys_nirq; }; static struct omap3_control_regs control_context; @@ -209,6 +214,37 @@ void omap4_ctrl_pad_writel(u32 val, u16 offset) __raw_writel(val, OMAP4_CTRL_PAD_REGADDR(offset)); } +#ifdef CONFIG_ARCH_OMAP3 + +/** + * omap3_ctrl_write_boot_mode - set scratchpad boot mode for the next boot + * @bootmode: 8-bit value to pass to some boot code + * + * Set the bootmode in the scratchpad RAM. This is used after the + * system restarts. Not sure what actually uses this - it may be the + * bootloader, rather than the boot ROM - contrary to the preserved + * comment below. No return value. + */ +void omap3_ctrl_write_boot_mode(u8 bootmode) +{ + u32 l; + + l = ('B' << 24) | ('M' << 16) | bootmode; + + /* + * Reserve the first word in scratchpad for communicating + * with the boot ROM. A pointer to a data structure + * describing the boot process can be stored there, + * cf. OMAP34xx TRM, Initialization / Software Booting + * Configuration. + * + * XXX This should use some omap_ctrl_writel()-type function + */ + __raw_writel(l, OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD + 4)); +} + +#endif + #if defined(CONFIG_ARCH_OMAP3) && defined(CONFIG_PM) /* * Clears the scratchpad contents in case of cold boot- @@ -220,13 +256,13 @@ void omap3_clear_scratchpad_contents(void) void __iomem *v_addr; u32 offset = 0; v_addr = OMAP2_L4_IO_ADDRESS(OMAP343X_SCRATCHPAD_ROM); - if (prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) & + if (omap2_prm_read_mod_reg(OMAP3430_GR_MOD, OMAP3_PRM_RSTST_OFFSET) & OMAP3430_GLOBAL_COLD_RST_MASK) { for ( ; offset <= max_offset; offset += 0x4) __raw_writel(0x0, (v_addr + offset)); - prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK, - OMAP3430_GR_MOD, - OMAP3_PRM_RSTST_OFFSET); + omap2_prm_set_mod_reg_bits(OMAP3430_GLOBAL_COLD_RST_MASK, + OMAP3430_GR_MOD, + OMAP3_PRM_RSTST_OFFSET); } } @@ -268,32 +304,34 @@ void omap3_save_scratchpad_contents(void) scratchpad_contents.sdrc_block_offset = 0x64; /* Populate the PRCM block contents */ - prcm_block_contents.prm_clksrc_ctrl = prm_read_mod_reg(OMAP3430_GR_MOD, - OMAP3_PRM_CLKSRC_CTRL_OFFSET); - prcm_block_contents.prm_clksel = prm_read_mod_reg(OMAP3430_CCR_MOD, - OMAP3_PRM_CLKSEL_OFFSET); + prcm_block_contents.prm_clksrc_ctrl = + omap2_prm_read_mod_reg(OMAP3430_GR_MOD, + OMAP3_PRM_CLKSRC_CTRL_OFFSET); + prcm_block_contents.prm_clksel = + omap2_prm_read_mod_reg(OMAP3430_CCR_MOD, + OMAP3_PRM_CLKSEL_OFFSET); prcm_block_contents.cm_clksel_core = - cm_read_mod_reg(CORE_MOD, CM_CLKSEL); + omap2_cm_read_mod_reg(CORE_MOD, CM_CLKSEL); prcm_block_contents.cm_clksel_wkup = - cm_read_mod_reg(WKUP_MOD, CM_CLKSEL); + omap2_cm_read_mod_reg(WKUP_MOD, CM_CLKSEL); prcm_block_contents.cm_clken_pll = - cm_read_mod_reg(PLL_MOD, CM_CLKEN); + omap2_cm_read_mod_reg(PLL_MOD, CM_CLKEN); prcm_block_contents.cm_autoidle_pll = - cm_read_mod_reg(PLL_MOD, OMAP3430_CM_AUTOIDLE_PLL); + omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_AUTOIDLE_PLL); prcm_block_contents.cm_clksel1_pll = - cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL1_PLL); + omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL1_PLL); prcm_block_contents.cm_clksel2_pll = - cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL2_PLL); + omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL2_PLL); prcm_block_contents.cm_clksel3_pll = - cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL3); + omap2_cm_read_mod_reg(PLL_MOD, OMAP3430_CM_CLKSEL3); prcm_block_contents.cm_clken_pll_mpu = - cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKEN_PLL); + omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKEN_PLL); prcm_block_contents.cm_autoidle_pll_mpu = - cm_read_mod_reg(MPU_MOD, OMAP3430_CM_AUTOIDLE_PLL); + omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_AUTOIDLE_PLL); prcm_block_contents.cm_clksel1_pll_mpu = - cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL); + omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL1_PLL); prcm_block_contents.cm_clksel2_pll_mpu = - cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL); + omap2_cm_read_mod_reg(MPU_MOD, OMAP3430_CM_CLKSEL2_PLL); prcm_block_contents.prcm_block_size = 0x0; /* Populate the SDRC block contents */ @@ -426,6 +464,8 @@ void omap3_control_save_context(void) control_context.sramldo4 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO4); control_context.sramldo5 = omap_ctrl_readl(OMAP343X_CONTROL_SRAMLDO5); control_context.csi = omap_ctrl_readl(OMAP343X_CONTROL_CSI); + control_context.padconf_sys_nirq = + omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_SYSNIRQ); return; } @@ -482,6 +522,8 @@ void omap3_control_restore_context(void) omap_ctrl_writel(control_context.sramldo4, OMAP343X_CONTROL_SRAMLDO4); omap_ctrl_writel(control_context.sramldo5, OMAP343X_CONTROL_SRAMLDO5); omap_ctrl_writel(control_context.csi, OMAP343X_CONTROL_CSI); + omap_ctrl_writel(control_context.padconf_sys_nirq, + OMAP343X_CONTROL_PADCONF_SYSNIRQ); return; } @@ -492,4 +534,31 @@ void omap3630_ctrl_disable_rta(void) omap_ctrl_writel(OMAP36XX_RTA_DISABLE, OMAP36XX_CONTROL_MEM_RTA_CTRL); } +/** + * omap3_ctrl_save_padconf - save padconf registers to scratchpad RAM + * + * Tell the SCM to start saving the padconf registers, then wait for + * the process to complete. Returns 0 unconditionally, although it + * should also eventually be able to return -ETIMEDOUT, if the save + * does not complete. + * + * XXX This function is missing a timeout. What should it be? + */ +int omap3_ctrl_save_padconf(void) +{ + u32 cpo; + + /* Save the padconf registers */ + cpo = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF); + cpo |= START_PADCONF_SAVE; + omap_ctrl_writel(cpo, OMAP343X_CONTROL_PADCONF_OFF); + + /* wait for the save to complete */ + while (!(omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS) + & PADCONF_SAVE_DONE)) + udelay(1); + + return 0; +} + #endif /* CONFIG_ARCH_OMAP3 && CONFIG_PM */ |