aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mach-mx3/clock-imx35.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-mx3/clock-imx35.c')
-rw-r--r--arch/arm/mach-mx3/clock-imx35.c550
1 files changed, 0 insertions, 550 deletions
diff --git a/arch/arm/mach-mx3/clock-imx35.c b/arch/arm/mach-mx3/clock-imx35.c
deleted file mode 100644
index 448a038cd1e..00000000000
--- a/arch/arm/mach-mx3/clock-imx35.c
+++ /dev/null
@@ -1,550 +0,0 @@
-/*
- * Copyright (C) 2009 by Sascha Hauer, Pengutronix
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301, USA.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/clk.h>
-#include <linux/io.h>
-#include <linux/clkdev.h>
-
-#include <mach/clock.h>
-#include <mach/hardware.h>
-#include <mach/common.h>
-
-#define CCM_BASE MX35_IO_ADDRESS(MX35_CCM_BASE_ADDR)
-
-#define CCM_CCMR 0x00
-#define CCM_PDR0 0x04
-#define CCM_PDR1 0x08
-#define CCM_PDR2 0x0C
-#define CCM_PDR3 0x10
-#define CCM_PDR4 0x14
-#define CCM_RCSR 0x18
-#define CCM_MPCTL 0x1C
-#define CCM_PPCTL 0x20
-#define CCM_ACMR 0x24
-#define CCM_COSR 0x28
-#define CCM_CGR0 0x2C
-#define CCM_CGR1 0x30
-#define CCM_CGR2 0x34
-#define CCM_CGR3 0x38
-
-#ifdef HAVE_SET_RATE_SUPPORT
-static void calc_dividers(u32 div, u32 *pre, u32 *post, u32 maxpost)
-{
- u32 min_pre, temp_pre, old_err, err;
-
- min_pre = (div - 1) / maxpost + 1;
- old_err = 8;
-
- for (temp_pre = 8; temp_pre >= min_pre; temp_pre--) {
- if (div > (temp_pre * maxpost))
- break;
-
- if (div < (temp_pre * temp_pre))
- continue;
-
- err = div % temp_pre;
-
- if (err == 0) {
- *pre = temp_pre;
- break;
- }
-
- err = temp_pre - err;
-
- if (err < old_err) {
- old_err = err;
- *pre = temp_pre;
- }
- }
-
- *post = (div + *pre - 1) / *pre;
-}
-
-/* get the best values for a 3-bit divider combined with a 6-bit divider */
-static void calc_dividers_3_6(u32 div, u32 *pre, u32 *post)
-{
- if (div >= 512) {
- *pre = 8;
- *post = 64;
- } else if (div >= 64) {
- calc_dividers(div, pre, post, 64);
- } else if (div <= 8) {
- *pre = div;
- *post = 1;
- } else {
- *pre = 1;
- *post = div;
- }
-}
-
-/* get the best values for two cascaded 3-bit dividers */
-static void calc_dividers_3_3(u32 div, u32 *pre, u32 *post)
-{
- if (div >= 64) {
- *pre = *post = 8;
- } else if (div > 8) {
- calc_dividers(div, pre, post, 8);
- } else {
- *pre = 1;
- *post = div;
- }
-}
-#endif
-
-static unsigned long get_rate_mpll(void)
-{
- ulong mpctl = __raw_readl(CCM_BASE + CCM_MPCTL);
-
- return mxc_decode_pll(mpctl, 24000000);
-}
-
-static unsigned long get_rate_ppll(void)
-{
- ulong ppctl = __raw_readl(CCM_BASE + CCM_PPCTL);
-
- return mxc_decode_pll(ppctl, 24000000);
-}
-
-struct arm_ahb_div {
- unsigned char arm, ahb, sel;
-};
-
-static struct arm_ahb_div clk_consumer[] = {
- { .arm = 1, .ahb = 4, .sel = 0},
- { .arm = 1, .ahb = 3, .sel = 1},
- { .arm = 2, .ahb = 2, .sel = 0},
- { .arm = 0, .ahb = 0, .sel = 0},
- { .arm = 0, .ahb = 0, .sel = 0},
- { .arm = 0, .ahb = 0, .sel = 0},
- { .arm = 4, .ahb = 1, .sel = 0},
- { .arm = 1, .ahb = 5, .sel = 0},
- { .arm = 1, .ahb = 8, .sel = 0},
- { .arm = 1, .ahb = 6, .sel = 1},
- { .arm = 2, .ahb = 4, .sel = 0},
- { .arm = 0, .ahb = 0, .sel = 0},
- { .arm = 0, .ahb = 0, .sel = 0},
- { .arm = 0, .ahb = 0, .sel = 0},
- { .arm = 4, .ahb = 2, .sel = 0},
- { .arm = 0, .ahb = 0, .sel = 0},
-};
-
-static unsigned long get_rate_arm(void)
-{
- unsigned long pdr0 = __raw_readl(CCM_BASE + CCM_PDR0);
- struct arm_ahb_div *aad;
- unsigned long fref = get_rate_mpll();
-
- aad = &clk_consumer[(pdr0 >> 16) & 0xf];
- if (aad->sel)
- fref = fref * 3 / 4;
-
- return fref / aad->arm;
-}
-
-static unsigned long get_rate_ahb(struct clk *clk)
-{
- unsigned long pdr0 = __raw_readl(CCM_BASE + CCM_PDR0);
- struct arm_ahb_div *aad;
- unsigned long fref = get_rate_arm();
-
- aad = &clk_consumer[(pdr0 >> 16) & 0xf];
-
- return fref / aad->ahb;
-}
-
-static unsigned long get_rate_ipg(struct clk *clk)
-{
- return get_rate_ahb(NULL) >> 1;
-}
-
-static unsigned long get_rate_uart(struct clk *clk)
-{
- unsigned long pdr3 = __raw_readl(CCM_BASE + CCM_PDR3);
- unsigned long pdr4 = __raw_readl(CCM_BASE + CCM_PDR4);
- unsigned long div = ((pdr4 >> 10) & 0x3f) + 1;
-
- if (pdr3 & (1 << 14))
- return get_rate_arm() / div;
- else
- return get_rate_ppll() / div;
-}
-
-static unsigned long get_rate_sdhc(struct clk *clk)
-{
- unsigned long pdr3 = __raw_readl(CCM_BASE + CCM_PDR3);
- unsigned long div, rate;
-
- if (pdr3 & (1 << 6))
- rate = get_rate_arm();
- else
- rate = get_rate_ppll();
-
- switch (clk->id) {
- default:
- case 0:
- div = pdr3 & 0x3f;
- break;
- case 1:
- div = (pdr3 >> 8) & 0x3f;
- break;
- case 2:
- div = (pdr3 >> 16) & 0x3f;
- break;
- }
-
- return rate / (div + 1);
-}
-
-static unsigned long get_rate_mshc(struct clk *clk)
-{
- unsigned long pdr1 = __raw_readl(CCM_BASE + CCM_PDR1);
- unsigned long div1, div2, rate;
-
- if (pdr1 & (1 << 7))
- rate = get_rate_arm();
- else
- rate = get_rate_ppll();
-
- div1 = (pdr1 >> 29) & 0x7;
- div2 = (pdr1 >> 22) & 0x3f;
-
- return rate / ((div1 + 1) * (div2 + 1));
-}
-
-static unsigned long get_rate_ssi(struct clk *clk)
-{
- unsigned long pdr2 = __raw_readl(CCM_BASE + CCM_PDR2);
- unsigned long div1, div2, rate;
-
- if (pdr2 & (1 << 6))
- rate = get_rate_arm();
- else
- rate = get_rate_ppll();
-
- switch (clk->id) {
- default:
- case 0:
- div1 = pdr2 & 0x3f;
- div2 = (pdr2 >> 24) & 0x7;
- break;
- case 1:
- div1 = (pdr2 >> 8) & 0x3f;
- div2 = (pdr2 >> 27) & 0x7;
- break;
- }
-
- return rate / ((div1 + 1) * (div2 + 1));
-}
-
-static unsigned long get_rate_csi(struct clk *clk)
-{
- unsigned long pdr2 = __raw_readl(CCM_BASE + CCM_PDR2);
- unsigned long rate;
-
- if (pdr2 & (1 << 7))
- rate = get_rate_arm();
- else
- rate = get_rate_ppll();
-
- return rate / (((pdr2 >> 16) & 0x3f) + 1);
-}
-
-static unsigned long get_rate_otg(struct clk *clk)
-{
- unsigned long pdr4 = __raw_readl(CCM_BASE + CCM_PDR4);
- unsigned long rate;
-
- if (pdr4 & (1 << 9))
- rate = get_rate_arm();
- else
- rate = get_rate_ppll();
-
- return rate / (((pdr4 >> 22) & 0x3f) + 1);
-}
-
-static unsigned long get_rate_ipg_per(struct clk *clk)
-{
- unsigned long pdr0 = __raw_readl(CCM_BASE + CCM_PDR0);
- unsigned long pdr4 = __raw_readl(CCM_BASE + CCM_PDR4);
- unsigned long div;
-
- if (pdr0 & (1 << 26)) {
- div = (pdr4 >> 16) & 0x3f;
- return get_rate_arm() / (div + 1);
- } else {
- div = (pdr0 >> 12) & 0x7;
- return get_rate_ahb(NULL) / (div + 1);
- }
-}
-
-static unsigned long get_rate_hsp(struct clk *clk)
-{
- unsigned long hsp_podf = (__raw_readl(CCM_BASE + CCM_PDR0) >> 20) & 0x03;
- unsigned long fref = get_rate_mpll();
-
- if (fref > 400 * 1000 * 1000) {
- switch (hsp_podf) {
- case 0:
- return fref >> 2;
- case 1:
- return fref >> 3;
- case 2:
- return fref / 3;
- }
- } else {
- switch (hsp_podf) {
- case 0:
- case 2:
- return fref / 3;
- case 1:
- return fref / 6;
- }
- }
-
- return 0;
-}
-
-static int clk_cgr_enable(struct clk *clk)
-{
- u32 reg;
-
- reg = __raw_readl(clk->enable_reg);
- reg |= 3 << clk->enable_shift;
- __raw_writel(reg, clk->enable_reg);
-
- return 0;
-}
-
-static void clk_cgr_disable(struct clk *clk)
-{
- u32 reg;
-
- reg = __raw_readl(clk->enable_reg);
- reg &= ~(3 << clk->enable_shift);
- __raw_writel(reg, clk->enable_reg);
-}
-
-#define DEFINE_CLOCK(name, i, er, es, gr, sr) \
- static struct clk name = { \
- .id = i, \
- .enable_reg = CCM_BASE + er, \
- .enable_shift = es, \
- .get_rate = gr, \
- .set_rate = sr, \
- .enable = clk_cgr_enable, \
- .disable = clk_cgr_disable, \
- }
-
-DEFINE_CLOCK(asrc_clk, 0, CCM_CGR0, 0, NULL, NULL);
-DEFINE_CLOCK(ata_clk, 0, CCM_CGR0, 2, get_rate_ipg, NULL);
-/* DEFINE_CLOCK(audmux_clk, 0, CCM_CGR0, 4, NULL, NULL); */
-DEFINE_CLOCK(can1_clk, 0, CCM_CGR0, 6, get_rate_ipg, NULL);
-DEFINE_CLOCK(can2_clk, 1, CCM_CGR0, 8, get_rate_ipg, NULL);
-DEFINE_CLOCK(cspi1_clk, 0, CCM_CGR0, 10, get_rate_ipg, NULL);
-DEFINE_CLOCK(cspi2_clk, 1, CCM_CGR0, 12, get_rate_ipg, NULL);
-DEFINE_CLOCK(ect_clk, 0, CCM_CGR0, 14, get_rate_ipg, NULL);
-DEFINE_CLOCK(edio_clk, 0, CCM_CGR0, 16, NULL, NULL);
-DEFINE_CLOCK(emi_clk, 0, CCM_CGR0, 18, get_rate_ipg, NULL);
-DEFINE_CLOCK(epit1_clk, 0, CCM_CGR0, 20, get_rate_ipg, NULL);
-DEFINE_CLOCK(epit2_clk, 1, CCM_CGR0, 22, get_rate_ipg, NULL);
-DEFINE_CLOCK(esai_clk, 0, CCM_CGR0, 24, NULL, NULL);
-DEFINE_CLOCK(esdhc1_clk, 0, CCM_CGR0, 26, get_rate_sdhc, NULL);
-DEFINE_CLOCK(esdhc2_clk, 1, CCM_CGR0, 28, get_rate_sdhc, NULL);
-DEFINE_CLOCK(esdhc3_clk, 2, CCM_CGR0, 30, get_rate_sdhc, NULL);
-
-DEFINE_CLOCK(fec_clk, 0, CCM_CGR1, 0, get_rate_ipg, NULL);
-DEFINE_CLOCK(gpio1_clk, 0, CCM_CGR1, 2, NULL, NULL);
-DEFINE_CLOCK(gpio2_clk, 1, CCM_CGR1, 4, NULL, NULL);
-DEFINE_CLOCK(gpio3_clk, 2, CCM_CGR1, 6, NULL, NULL);
-DEFINE_CLOCK(gpt_clk, 0, CCM_CGR1, 8, get_rate_ipg, NULL);
-DEFINE_CLOCK(i2c1_clk, 0, CCM_CGR1, 10, get_rate_ipg_per, NULL);
-DEFINE_CLOCK(i2c2_clk, 1, CCM_CGR1, 12, get_rate_ipg_per, NULL);
-DEFINE_CLOCK(i2c3_clk, 2, CCM_CGR1, 14, get_rate_ipg_per, NULL);
-DEFINE_CLOCK(iomuxc_clk, 0, CCM_CGR1, 16, NULL, NULL);
-DEFINE_CLOCK(ipu_clk, 0, CCM_CGR1, 18, get_rate_hsp, NULL);
-DEFINE_CLOCK(kpp_clk, 0, CCM_CGR1, 20, get_rate_ipg, NULL);
-DEFINE_CLOCK(mlb_clk, 0, CCM_CGR1, 22, get_rate_ahb, NULL);
-DEFINE_CLOCK(mshc_clk, 0, CCM_CGR1, 24, get_rate_mshc, NULL);
-DEFINE_CLOCK(owire_clk, 0, CCM_CGR1, 26, get_rate_ipg_per, NULL);
-DEFINE_CLOCK(pwm_clk, 0, CCM_CGR1, 28, get_rate_ipg_per, NULL);
-DEFINE_CLOCK(rngc_clk, 0, CCM_CGR1, 30, get_rate_ipg, NULL);
-
-DEFINE_CLOCK(rtc_clk, 0, CCM_CGR2, 0, get_rate_ipg, NULL);
-DEFINE_CLOCK(rtic_clk, 0, CCM_CGR2, 2, get_rate_ahb, NULL);
-DEFINE_CLOCK(scc_clk, 0, CCM_CGR2, 4, get_rate_ipg, NULL);
-DEFINE_CLOCK(sdma_clk, 0, CCM_CGR2, 6, NULL, NULL);
-DEFINE_CLOCK(spba_clk, 0, CCM_CGR2, 8, get_rate_ipg, NULL);
-DEFINE_CLOCK(spdif_clk, 0, CCM_CGR2, 10, NULL, NULL);
-DEFINE_CLOCK(ssi1_clk, 0, CCM_CGR2, 12, get_rate_ssi, NULL);
-DEFINE_CLOCK(ssi2_clk, 1, CCM_CGR2, 14, get_rate_ssi, NULL);
-DEFINE_CLOCK(uart1_clk, 0, CCM_CGR2, 16, get_rate_uart, NULL);
-DEFINE_CLOCK(uart2_clk, 1, CCM_CGR2, 18, get_rate_uart, NULL);
-DEFINE_CLOCK(uart3_clk, 2, CCM_CGR2, 20, get_rate_uart, NULL);
-DEFINE_CLOCK(usbotg_clk, 0, CCM_CGR2, 22, get_rate_otg, NULL);
-DEFINE_CLOCK(wdog_clk, 0, CCM_CGR2, 24, NULL, NULL);
-DEFINE_CLOCK(max_clk, 0, CCM_CGR2, 26, NULL, NULL);
-DEFINE_CLOCK(audmux_clk, 0, CCM_CGR2, 30, NULL, NULL);
-
-DEFINE_CLOCK(csi_clk, 0, CCM_CGR3, 0, get_rate_csi, NULL);
-DEFINE_CLOCK(iim_clk, 0, CCM_CGR3, 2, NULL, NULL);
-DEFINE_CLOCK(gpu2d_clk, 0, CCM_CGR3, 4, NULL, NULL);
-
-DEFINE_CLOCK(usbahb_clk, 0, 0, 0, get_rate_ahb, NULL);
-
-static int clk_dummy_enable(struct clk *clk)
-{
- return 0;
-}
-
-static void clk_dummy_disable(struct clk *clk)
-{
-}
-
-static unsigned long get_rate_nfc(struct clk *clk)
-{
- unsigned long div1;
-
- div1 = (__raw_readl(CCM_BASE + CCM_PDR4) >> 28) + 1;
-
- return get_rate_ahb(NULL) / div1;
-}
-
-/* NAND Controller: It seems it can't be disabled */
-static struct clk nfc_clk = {
- .id = 0,
- .enable_reg = 0,
- .enable_shift = 0,
- .get_rate = get_rate_nfc,
- .set_rate = NULL, /* set_rate_nfc, */
- .enable = clk_dummy_enable,
- .disable = clk_dummy_disable
-};
-
-#define _REGISTER_CLOCK(d, n, c) \
- { \
- .dev_id = d, \
- .con_id = n, \
- .clk = &c, \
- },
-
-static struct clk_lookup lookups[] = {
- _REGISTER_CLOCK(NULL, "asrc", asrc_clk)
- _REGISTER_CLOCK(NULL, "ata", ata_clk)
- _REGISTER_CLOCK("flexcan.0", NULL, can1_clk)
- _REGISTER_CLOCK("flexcan.1", NULL, can2_clk)
- _REGISTER_CLOCK("imx35-cspi.0", NULL, cspi1_clk)
- _REGISTER_CLOCK("imx35-cspi.1", NULL, cspi2_clk)
- _REGISTER_CLOCK(NULL, "ect", ect_clk)
- _REGISTER_CLOCK(NULL, "edio", edio_clk)
- _REGISTER_CLOCK(NULL, "emi", emi_clk)
- _REGISTER_CLOCK("imx-epit.0", NULL, epit1_clk)
- _REGISTER_CLOCK("imx-epit.1", NULL, epit2_clk)
- _REGISTER_CLOCK(NULL, "esai", esai_clk)
- _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk)
- _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk)
- _REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_clk)
- _REGISTER_CLOCK("fec.0", NULL, fec_clk)
- _REGISTER_CLOCK(NULL, "gpio", gpio1_clk)
- _REGISTER_CLOCK(NULL, "gpio", gpio2_clk)
- _REGISTER_CLOCK(NULL, "gpio", gpio3_clk)
- _REGISTER_CLOCK("gpt.0", NULL, gpt_clk)
- _REGISTER_CLOCK("imx-i2c.0", NULL, i2c1_clk)
- _REGISTER_CLOCK("imx-i2c.1", NULL, i2c2_clk)
- _REGISTER_CLOCK("imx-i2c.2", NULL, i2c3_clk)
- _REGISTER_CLOCK(NULL, "iomuxc", iomuxc_clk)
- _REGISTER_CLOCK("ipu-core", NULL, ipu_clk)
- _REGISTER_CLOCK("mx3_sdc_fb", NULL, ipu_clk)
- _REGISTER_CLOCK(NULL, "kpp", kpp_clk)
- _REGISTER_CLOCK(NULL, "mlb", mlb_clk)
- _REGISTER_CLOCK(NULL, "mshc", mshc_clk)
- _REGISTER_CLOCK("mxc_w1", NULL, owire_clk)
- _REGISTER_CLOCK(NULL, "pwm", pwm_clk)
- _REGISTER_CLOCK(NULL, "rngc", rngc_clk)
- _REGISTER_CLOCK(NULL, "rtc", rtc_clk)
- _REGISTER_CLOCK(NULL, "rtic", rtic_clk)
- _REGISTER_CLOCK(NULL, "scc", scc_clk)
- _REGISTER_CLOCK("imx-sdma", NULL, sdma_clk)
- _REGISTER_CLOCK(NULL, "spba", spba_clk)
- _REGISTER_CLOCK(NULL, "spdif", spdif_clk)
- _REGISTER_CLOCK("imx-ssi.0", NULL, ssi1_clk)
- _REGISTER_CLOCK("imx-ssi.1", NULL, ssi2_clk)
- _REGISTER_CLOCK("imx-uart.0", NULL, uart1_clk)
- _REGISTER_CLOCK("imx-uart.1", NULL, uart2_clk)
- _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk)
- _REGISTER_CLOCK("mxc-ehci.0", "usb", usbotg_clk)
- _REGISTER_CLOCK("mxc-ehci.1", "usb", usbotg_clk)
- _REGISTER_CLOCK("mxc-ehci.2", "usb", usbotg_clk)
- _REGISTER_CLOCK("fsl-usb2-udc", "usb", usbotg_clk)
- _REGISTER_CLOCK("fsl-usb2-udc", "usb_ahb", usbahb_clk)
- _REGISTER_CLOCK("imx2-wdt.0", NULL, wdog_clk)
- _REGISTER_CLOCK(NULL, "max", max_clk)
- _REGISTER_CLOCK(NULL, "audmux", audmux_clk)
- _REGISTER_CLOCK(NULL, "csi", csi_clk)
- _REGISTER_CLOCK(NULL, "iim", iim_clk)
- _REGISTER_CLOCK(NULL, "gpu2d", gpu2d_clk)
- _REGISTER_CLOCK("mxc_nand.0", NULL, nfc_clk)
-};
-
-int __init mx35_clocks_init()
-{
- unsigned int cgr2 = 3 << 26, cgr3 = 0;
-
-#if defined(CONFIG_DEBUG_LL) && !defined(CONFIG_DEBUG_ICEDCC)
- cgr2 |= 3 << 16;
-#endif
-
- clkdev_add_table(lookups, ARRAY_SIZE(lookups));
-
- /* Turn off all clocks except the ones we need to survive, namely:
- * EMI, GPIO1/2/3, GPT, IOMUX, MAX and eventually uart
- */
- __raw_writel((3 << 18), CCM_BASE + CCM_CGR0);
- __raw_writel((3 << 2) | (3 << 4) | (3 << 6) | (3 << 8) | (3 << 16),
- CCM_BASE + CCM_CGR1);
-
- /*
- * Check if we came up in internal boot mode. If yes, we need some
- * extra clocks turned on, otherwise the MX35 boot ROM code will
- * hang after a watchdog reset.
- */
- if (!(__raw_readl(CCM_BASE + CCM_RCSR) & (3 << 10))) {
- /* Additionally turn on UART1, SCC, and IIM clocks */
- cgr2 |= 3 << 16 | 3 << 4;
- cgr3 |= 3 << 2;
- }
-
- __raw_writel(cgr2, CCM_BASE + CCM_CGR2);
- __raw_writel(cgr3, CCM_BASE + CCM_CGR3);
-
- clk_enable(&iim_clk);
- mx35_read_cpu_rev();
-
-#ifdef CONFIG_MXC_USE_EPIT
- epit_timer_init(&epit1_clk,
- MX35_IO_ADDRESS(MX35_EPIT1_BASE_ADDR), MX35_INT_EPIT1);
-#else
- mxc_timer_init(&gpt_clk,
- MX35_IO_ADDRESS(MX35_GPT1_BASE_ADDR), MX35_INT_GPT);
-#endif
-
- return 0;
-}
-