summaryrefslogtreecommitdiff
path: root/arch/arm/mach-mxc91231/clock.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-mxc91231/clock.c')
-rw-r--r--arch/arm/mach-mxc91231/clock.c640
1 files changed, 0 insertions, 640 deletions
diff --git a/arch/arm/mach-mxc91231/clock.c b/arch/arm/mach-mxc91231/clock.c
deleted file mode 100644
index 9fab505f1eb1..000000000000
--- a/arch/arm/mach-mxc91231/clock.c
+++ /dev/null
@@ -1,640 +0,0 @@
-#include <linux/clk.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/clkdev.h>
-
-#include <mach/clock.h>
-#include <mach/hardware.h>
-#include <mach/common.h>
-
-#include <asm/bug.h>
-#include <asm/div64.h>
-
-#include "crm_regs.h"
-
-#define CRM_SMALL_DIVIDER(base, name) \
- crm_small_divider(base, \
- base ## _ ## name ## _OFFSET, \
- base ## _ ## name ## _MASK)
-#define CRM_1DIVIDER(base, name) \
- crm_divider(base, \
- base ## _ ## name ## _OFFSET, \
- base ## _ ## name ## _MASK, 1)
-#define CRM_16DIVIDER(base, name) \
- crm_divider(base, \
- base ## _ ## name ## _OFFSET, \
- base ## _ ## name ## _MASK, 16)
-
-static u32 crm_small_divider(void __iomem *reg, u8 offset, u32 mask)
-{
- static const u32 crm_small_dividers[] = {
- 2, 3, 4, 5, 6, 8, 10, 12
- };
- u8 idx;
-
- idx = (__raw_readl(reg) & mask) >> offset;
- if (idx > 7)
- return 1;
-
- return crm_small_dividers[idx];
-}
-
-static u32 crm_divider(void __iomem *reg, u8 offset, u32 mask, u32 z)
-{
- u32 div;
- div = (__raw_readl(reg) & mask) >> offset;
- return div ? div : z;
-}
-
-static int _clk_1bit_enable(struct clk *clk)
-{
- u32 reg;
-
- reg = __raw_readl(clk->enable_reg);
- reg |= 1 << clk->enable_shift;
- __raw_writel(reg, clk->enable_reg);
-
- return 0;
-}
-
-static void _clk_1bit_disable(struct clk *clk)
-{
- u32 reg;
-
- reg = __raw_readl(clk->enable_reg);
- reg &= ~(1 << clk->enable_shift);
- __raw_writel(reg, clk->enable_reg);
-}
-
-static int _clk_3bit_enable(struct clk *clk)
-{
- u32 reg;
-
- reg = __raw_readl(clk->enable_reg);
- reg |= 0x7 << clk->enable_shift;
- __raw_writel(reg, clk->enable_reg);
-
- return 0;
-}
-
-static void _clk_3bit_disable(struct clk *clk)
-{
- u32 reg;
-
- reg = __raw_readl(clk->enable_reg);
- reg &= ~(0x7 << clk->enable_shift);
- __raw_writel(reg, clk->enable_reg);
-}
-
-static unsigned long ckih_rate;
-
-static unsigned long clk_ckih_get_rate(struct clk *clk)
-{
- return ckih_rate;
-}
-
-static struct clk ckih_clk = {
- .get_rate = clk_ckih_get_rate,
-};
-
-static unsigned long clk_ckih_x2_get_rate(struct clk *clk)
-{
- return 2 * clk_get_rate(clk->parent);
-}
-
-static struct clk ckih_x2_clk = {
- .parent = &ckih_clk,
- .get_rate = clk_ckih_x2_get_rate,
-};
-
-static unsigned long clk_ckil_get_rate(struct clk *clk)
-{
- return CKIL_CLK_FREQ;
-}
-
-static struct clk ckil_clk = {
- .get_rate = clk_ckil_get_rate,
-};
-
-/* plls stuff */
-static struct clk mcu_pll_clk;
-static struct clk dsp_pll_clk;
-static struct clk usb_pll_clk;
-
-static struct clk *pll_clk(u8 sel)
-{
- switch (sel) {
- case 0:
- return &mcu_pll_clk;
- case 1:
- return &dsp_pll_clk;
- case 2:
- return &usb_pll_clk;
- }
- BUG();
-}
-
-static void __iomem *pll_base(struct clk *clk)
-{
- if (clk == &mcu_pll_clk)
- return MXC_PLL0_BASE;
- else if (clk == &dsp_pll_clk)
- return MXC_PLL1_BASE;
- else if (clk == &usb_pll_clk)
- return MXC_PLL2_BASE;
- BUG();
-}
-
-static unsigned long clk_pll_get_rate(struct clk *clk)
-{
- const void __iomem *pllbase;
- unsigned long dp_op, dp_mfd, dp_mfn, pll_hfsm, ref_clk, mfi;
- long mfn, mfn_abs, mfd, pdf;
- s64 temp;
- pllbase = pll_base(clk);
-
- pll_hfsm = __raw_readl(pllbase + MXC_PLL_DP_CTL) & MXC_PLL_DP_CTL_HFSM;
- if (pll_hfsm == 0) {
- dp_op = __raw_readl(pllbase + MXC_PLL_DP_OP);
- dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_MFD);
- dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_MFN);
- } else {
- dp_op = __raw_readl(pllbase + MXC_PLL_DP_HFS_OP);
- dp_mfd = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFD);
- dp_mfn = __raw_readl(pllbase + MXC_PLL_DP_HFS_MFN);
- }
-
- pdf = dp_op & MXC_PLL_DP_OP_PDF_MASK;
- mfi = (dp_op >> MXC_PLL_DP_OP_MFI_OFFSET) & MXC_PLL_DP_OP_PDF_MASK;
- mfi = (mfi <= 5) ? 5 : mfi;
- mfd = dp_mfd & MXC_PLL_DP_MFD_MASK;
- mfn = dp_mfn & MXC_PLL_DP_MFN_MASK;
- mfn = (mfn <= 0x4000000) ? mfn : (mfn - 0x10000000);
-
- if (mfn < 0)
- mfn_abs = -mfn;
- else
- mfn_abs = mfn;
-
-/* XXX: actually this asumes that ckih is fed to pll, but spec says
- * that ckih_x2 is also possible. need to check this out.
- */
- ref_clk = clk_get_rate(&ckih_clk);
-
- ref_clk *= 2;
- ref_clk /= pdf + 1;
-
- temp = (u64) ref_clk * mfn_abs;
- do_div(temp, mfd);
- if (mfn < 0)
- temp = -temp;
- temp += ref_clk * mfi;
-
- return temp;
-}
-
-static int clk_pll_enable(struct clk *clk)
-{
- void __iomem *ctl;
- u32 reg;
-
- ctl = pll_base(clk);
- reg = __raw_readl(ctl);
- reg |= (MXC_PLL_DP_CTL_RST | MXC_PLL_DP_CTL_UPEN);
- __raw_writel(reg, ctl);
- do {
- reg = __raw_readl(ctl);
- } while ((reg & MXC_PLL_DP_CTL_LRF) != MXC_PLL_DP_CTL_LRF);
- return 0;
-}
-
-static void clk_pll_disable(struct clk *clk)
-{
- void __iomem *ctl;
- u32 reg;
-
- ctl = pll_base(clk);
- reg = __raw_readl(ctl);
- reg &= ~(MXC_PLL_DP_CTL_RST | MXC_PLL_DP_CTL_UPEN);
- __raw_writel(reg, ctl);
-}
-
-static struct clk mcu_pll_clk = {
- .parent = &ckih_clk,
- .get_rate = clk_pll_get_rate,
- .enable = clk_pll_enable,
- .disable = clk_pll_disable,
-};
-
-static struct clk dsp_pll_clk = {
- .parent = &ckih_clk,
- .get_rate = clk_pll_get_rate,
- .enable = clk_pll_enable,
- .disable = clk_pll_disable,
-};
-
-static struct clk usb_pll_clk = {
- .parent = &ckih_clk,
- .get_rate = clk_pll_get_rate,
- .enable = clk_pll_enable,
- .disable = clk_pll_disable,
-};
-/* plls stuff end */
-
-/* ap_ref_clk stuff */
-static struct clk ap_ref_clk;
-
-static unsigned long clk_ap_ref_get_rate(struct clk *clk)
-{
- u32 ascsr, acsr;
- u8 ap_pat_ref_div_2, ap_isel, acs, ads;
-
- ascsr = __raw_readl(MXC_CRMAP_ASCSR);
- acsr = __raw_readl(MXC_CRMAP_ACSR);
-
- /* 0 for ckih, 1 for ckih*2 */
- ap_isel = ascsr & MXC_CRMAP_ASCSR_APISEL;
- /* reg divider */
- ap_pat_ref_div_2 = (ascsr >> MXC_CRMAP_ASCSR_AP_PATDIV2_OFFSET) & 0x1;
- /* undocumented, 1 for disabling divider */
- ads = (acsr >> MXC_CRMAP_ACSR_ADS_OFFSET) & 0x1;
- /* 0 for pat_ref, 1 for divider out */
- acs = acsr & MXC_CRMAP_ACSR_ACS;
-
- if (acs & !ads)
- /* use divided clock */
- return clk_get_rate(clk->parent) / (ap_pat_ref_div_2 ? 2 : 1);
-
- return clk_get_rate(clk->parent) * (ap_isel ? 2 : 1);
-}
-
-static struct clk ap_ref_clk = {
- .parent = &ckih_clk,
- .get_rate = clk_ap_ref_get_rate,
-};
-/* ap_ref_clk stuff end */
-
-/* ap_pre_dfs_clk stuff */
-static struct clk ap_pre_dfs_clk;
-
-static unsigned long clk_ap_pre_dfs_get_rate(struct clk *clk)
-{
- u32 acsr, ascsr;
-
- acsr = __raw_readl(MXC_CRMAP_ACSR);
- ascsr = __raw_readl(MXC_CRMAP_ASCSR);
-
- if (acsr & MXC_CRMAP_ACSR_ACS) {
- u8 sel;
- sel = (ascsr & MXC_CRMAP_ASCSR_APSEL_MASK) >>
- MXC_CRMAP_ASCSR_APSEL_OFFSET;
- return clk_get_rate(pll_clk(sel)) /
- CRM_SMALL_DIVIDER(MXC_CRMAP_ACDR, ARMDIV);
- }
- return clk_get_rate(&ap_ref_clk);
-}
-
-static struct clk ap_pre_dfs_clk = {
- .get_rate = clk_ap_pre_dfs_get_rate,
-};
-/* ap_pre_dfs_clk stuff end */
-
-/* usb_clk stuff */
-static struct clk usb_clk;
-
-static struct clk *clk_usb_parent(struct clk *clk)
-{
- u32 acsr, ascsr;
-
- acsr = __raw_readl(MXC_CRMAP_ACSR);
- ascsr = __raw_readl(MXC_CRMAP_ASCSR);
-
- if (acsr & MXC_CRMAP_ACSR_ACS) {
- u8 sel;
- sel = (ascsr & MXC_CRMAP_ASCSR_USBSEL_MASK) >>
- MXC_CRMAP_ASCSR_USBSEL_OFFSET;
- return pll_clk(sel);
- }
- return &ap_ref_clk;
-}
-
-static unsigned long clk_usb_get_rate(struct clk *clk)
-{
- return clk_get_rate(clk->parent) /
- CRM_SMALL_DIVIDER(MXC_CRMAP_ACDER2, USBDIV);
-}
-
-static struct clk usb_clk = {
- .enable_reg = MXC_CRMAP_ACDER2,
- .enable_shift = MXC_CRMAP_ACDER2_USBEN_OFFSET,
- .get_rate = clk_usb_get_rate,
- .enable = _clk_1bit_enable,
- .disable = _clk_1bit_disable,
-};
-/* usb_clk stuff end */
-
-static unsigned long clk_ipg_get_rate(struct clk *clk)
-{
- return clk_get_rate(clk->parent) / CRM_16DIVIDER(MXC_CRMAP_ACDR, IPDIV);
-}
-
-static unsigned long clk_ahb_get_rate(struct clk *clk)
-{
- return clk_get_rate(clk->parent) /
- CRM_16DIVIDER(MXC_CRMAP_ACDR, AHBDIV);
-}
-
-static struct clk ipg_clk = {
- .parent = &ap_pre_dfs_clk,
- .get_rate = clk_ipg_get_rate,
-};
-
-static struct clk ahb_clk = {
- .parent = &ap_pre_dfs_clk,
- .get_rate = clk_ahb_get_rate,
-};
-
-/* perclk_clk stuff */
-static struct clk perclk_clk;
-
-static unsigned long clk_perclk_get_rate(struct clk *clk)
-{
- u32 acder2;
-
- acder2 = __raw_readl(MXC_CRMAP_ACDER2);
- if (acder2 & MXC_CRMAP_ACDER2_BAUD_ISEL_MASK)
- return 2 * clk_get_rate(clk->parent);
-
- return clk_get_rate(clk->parent);
-}
-
-static struct clk perclk_clk = {
- .parent = &ckih_clk,
- .get_rate = clk_perclk_get_rate,
-};
-/* perclk_clk stuff end */
-
-/* uart_clk stuff */
-static struct clk uart_clk[];
-
-static unsigned long clk_uart_get_rate(struct clk *clk)
-{
- u32 div;
-
- switch (clk->id) {
- case 0:
- case 1:
- div = CRM_SMALL_DIVIDER(MXC_CRMAP_ACDER2, BAUDDIV);
- break;
- case 2:
- div = CRM_SMALL_DIVIDER(MXC_CRMAP_APRA, UART3DIV);
- break;
- default:
- BUG();
- }
- return clk_get_rate(clk->parent) / div;
-}
-
-static struct clk uart_clk[] = {
- {
- .id = 0,
- .parent = &perclk_clk,
- .enable_reg = MXC_CRMAP_APRA,
- .enable_shift = MXC_CRMAP_APRA_UART1EN_OFFSET,
- .get_rate = clk_uart_get_rate,
- .enable = _clk_1bit_enable,
- .disable = _clk_1bit_disable,
- }, {
- .id = 1,
- .parent = &perclk_clk,
- .enable_reg = MXC_CRMAP_APRA,
- .enable_shift = MXC_CRMAP_APRA_UART2EN_OFFSET,
- .get_rate = clk_uart_get_rate,
- .enable = _clk_1bit_enable,
- .disable = _clk_1bit_disable,
- }, {
- .id = 2,
- .parent = &perclk_clk,
- .enable_reg = MXC_CRMAP_APRA,
- .enable_shift = MXC_CRMAP_APRA_UART3EN_OFFSET,
- .get_rate = clk_uart_get_rate,
- .enable = _clk_1bit_enable,
- .disable = _clk_1bit_disable,
- },
-};
-/* uart_clk stuff end */
-
-/* sdhc_clk stuff */
-static struct clk nfc_clk;
-
-static unsigned long clk_nfc_get_rate(struct clk *clk)
-{
- return clk_get_rate(clk->parent) /
- CRM_1DIVIDER(MXC_CRMAP_ACDER2, NFCDIV);
-}
-
-static struct clk nfc_clk = {
- .parent = &ahb_clk,
- .enable_reg = MXC_CRMAP_ACDER2,
- .enable_shift = MXC_CRMAP_ACDER2_NFCEN_OFFSET,
- .get_rate = clk_nfc_get_rate,
- .enable = _clk_1bit_enable,
- .disable = _clk_1bit_disable,
-};
-/* sdhc_clk stuff end */
-
-/* sdhc_clk stuff */
-static struct clk sdhc_clk[];
-
-static struct clk *clk_sdhc_parent(struct clk *clk)
-{
- u32 aprb;
- u8 sel;
- u32 mask;
- int offset;
-
- aprb = __raw_readl(MXC_CRMAP_APRB);
-
- switch (clk->id) {
- case 0:
- mask = MXC_CRMAP_APRB_SDHC1_ISEL_MASK;
- offset = MXC_CRMAP_APRB_SDHC1_ISEL_OFFSET;
- break;
- case 1:
- mask = MXC_CRMAP_APRB_SDHC2_ISEL_MASK;
- offset = MXC_CRMAP_APRB_SDHC2_ISEL_OFFSET;
- break;
- default:
- BUG();
- }
- sel = (aprb & mask) >> offset;
-
- switch (sel) {
- case 0:
- return &ckih_clk;
- case 1:
- return &ckih_x2_clk;
- }
- return &usb_clk;
-}
-
-static unsigned long clk_sdhc_get_rate(struct clk *clk)
-{
- u32 div;
-
- switch (clk->id) {
- case 0:
- div = CRM_SMALL_DIVIDER(MXC_CRMAP_APRB, SDHC1_DIV);
- break;
- case 1:
- div = CRM_SMALL_DIVIDER(MXC_CRMAP_APRB, SDHC2_DIV);
- break;
- default:
- BUG();
- }
-
- return clk_get_rate(clk->parent) / div;
-}
-
-static int clk_sdhc_enable(struct clk *clk)
-{
- u32 amlpmre1, aprb;
-
- amlpmre1 = __raw_readl(MXC_CRMAP_AMLPMRE1);
- aprb = __raw_readl(MXC_CRMAP_APRB);
- switch (clk->id) {
- case 0:
- amlpmre1 |= (0x7 << MXC_CRMAP_AMLPMRE1_MLPME4_OFFSET);
- aprb |= (0x1 << MXC_CRMAP_APRB_SDHC1EN_OFFSET);
- break;
- case 1:
- amlpmre1 |= (0x7 << MXC_CRMAP_AMLPMRE1_MLPME5_OFFSET);
- aprb |= (0x1 << MXC_CRMAP_APRB_SDHC2EN_OFFSET);
- break;
- }
- __raw_writel(amlpmre1, MXC_CRMAP_AMLPMRE1);
- __raw_writel(aprb, MXC_CRMAP_APRB);
- return 0;
-}
-
-static void clk_sdhc_disable(struct clk *clk)
-{
- u32 amlpmre1, aprb;
-
- amlpmre1 = __raw_readl(MXC_CRMAP_AMLPMRE1);
- aprb = __raw_readl(MXC_CRMAP_APRB);
- switch (clk->id) {
- case 0:
- amlpmre1 &= ~(0x7 << MXC_CRMAP_AMLPMRE1_MLPME4_OFFSET);
- aprb &= ~(0x1 << MXC_CRMAP_APRB_SDHC1EN_OFFSET);
- break;
- case 1:
- amlpmre1 &= ~(0x7 << MXC_CRMAP_AMLPMRE1_MLPME5_OFFSET);
- aprb &= ~(0x1 << MXC_CRMAP_APRB_SDHC2EN_OFFSET);
- break;
- }
- __raw_writel(amlpmre1, MXC_CRMAP_AMLPMRE1);
- __raw_writel(aprb, MXC_CRMAP_APRB);
-}
-
-static struct clk sdhc_clk[] = {
- {
- .id = 0,
- .get_rate = clk_sdhc_get_rate,
- .enable = clk_sdhc_enable,
- .disable = clk_sdhc_disable,
- }, {
- .id = 1,
- .get_rate = clk_sdhc_get_rate,
- .enable = clk_sdhc_enable,
- .disable = clk_sdhc_disable,
- },
-};
-/* sdhc_clk stuff end */
-
-/* wdog_clk stuff */
-static struct clk wdog_clk[] = {
- {
- .id = 0,
- .parent = &ipg_clk,
- .enable_reg = MXC_CRMAP_AMLPMRD,
- .enable_shift = MXC_CRMAP_AMLPMRD_MLPMD7_OFFSET,
- .enable = _clk_3bit_enable,
- .disable = _clk_3bit_disable,
- }, {
- .id = 1,
- .parent = &ipg_clk,
- .enable_reg = MXC_CRMAP_AMLPMRD,
- .enable_shift = MXC_CRMAP_AMLPMRD_MLPMD3_OFFSET,
- .enable = _clk_3bit_enable,
- .disable = _clk_3bit_disable,
- },
-};
-/* wdog_clk stuff end */
-
-/* gpt_clk stuff */
-static struct clk gpt_clk = {
- .parent = &ipg_clk,
- .enable_reg = MXC_CRMAP_AMLPMRC,
- .enable_shift = MXC_CRMAP_AMLPMRC_MLPMC4_OFFSET,
- .enable = _clk_3bit_enable,
- .disable = _clk_3bit_disable,
-};
-/* gpt_clk stuff end */
-
-/* cspi_clk stuff */
-static struct clk cspi_clk[] = {
- {
- .id = 0,
- .parent = &ipg_clk,
- .enable_reg = MXC_CRMAP_AMLPMRE2,
- .enable_shift = MXC_CRMAP_AMLPMRE2_MLPME0_OFFSET,
- .enable = _clk_3bit_enable,
- .disable = _clk_3bit_disable,
- }, {
- .id = 1,
- .parent = &ipg_clk,
- .enable_reg = MXC_CRMAP_AMLPMRE1,
- .enable_shift = MXC_CRMAP_AMLPMRE1_MLPME6_OFFSET,
- .enable = _clk_3bit_enable,
- .disable = _clk_3bit_disable,
- },
-};
-/* cspi_clk stuff end */
-
-#define _REGISTER_CLOCK(d, n, c) \
- { \
- .dev_id = d, \
- .con_id = n, \
- .clk = &c, \
- },
-
-static struct clk_lookup lookups[] = {
- _REGISTER_CLOCK("imx-uart.0", NULL, uart_clk[0])
- _REGISTER_CLOCK("imx-uart.1", NULL, uart_clk[1])
- _REGISTER_CLOCK("imx-uart.2", NULL, uart_clk[2])
- _REGISTER_CLOCK("mxc-mmc.0", NULL, sdhc_clk[0])
- _REGISTER_CLOCK("mxc-mmc.1", NULL, sdhc_clk[1])
- _REGISTER_CLOCK("mxc-wdt.0", NULL, wdog_clk[0])
- _REGISTER_CLOCK("spi_imx.0", NULL, cspi_clk[0])
- _REGISTER_CLOCK("spi_imx.1", NULL, cspi_clk[1])
-};
-
-int __init mxc91231_clocks_init(unsigned long fref)
-{
- void __iomem *gpt_base;
-
- ckih_rate = fref;
-
- usb_clk.parent = clk_usb_parent(&usb_clk);
- sdhc_clk[0].parent = clk_sdhc_parent(&sdhc_clk[0]);
- sdhc_clk[1].parent = clk_sdhc_parent(&sdhc_clk[1]);
-
- clkdev_add_table(lookups, ARRAY_SIZE(lookups));
-
- gpt_base = MXC91231_IO_ADDRESS(MXC91231_GPT1_BASE_ADDR);
- mxc_timer_init(&gpt_clk, gpt_base, MXC91231_INT_GPT);
-
- return 0;
-}