/* * 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 #include #include #include #include #include #include #include #include #include #define CRM_BASE MX25_IO_ADDRESS(MX25_CRM_BASE_ADDR) #define CCM_MPCTL 0x00 #define CCM_UPCTL 0x04 #define CCM_CCTL 0x08 #define CCM_CGCR0 0x0C #define CCM_CGCR1 0x10 #define CCM_CGCR2 0x14 #define CCM_PCDR0 0x18 #define CCM_PCDR1 0x1C #define CCM_PCDR2 0x20 #define CCM_PCDR3 0x24 #define CCM_RCSR 0x28 #define CCM_CRDR 0x2C #define CCM_DCVR0 0x30 #define CCM_DCVR1 0x34 #define CCM_DCVR2 0x38 #define CCM_DCVR3 0x3c #define CCM_LTR0 0x40 #define CCM_LTR1 0x44 #define CCM_LTR2 0x48 #define CCM_LTR3 0x4c static unsigned long get_rate_mpll(void) { ulong mpctl = __raw_readl(CRM_BASE + CCM_MPCTL); return mxc_decode_pll(mpctl, 24000000); } static unsigned long get_rate_upll(void) { ulong mpctl = __raw_readl(CRM_BASE + CCM_UPCTL); return mxc_decode_pll(mpctl, 24000000); } unsigned long get_rate_arm(struct clk *clk) { unsigned long cctl = readl(CRM_BASE + CCM_CCTL); unsigned long rate = get_rate_mpll(); if (cctl & (1 << 14)) rate = (rate * 3) >> 1; return rate / ((cctl >> 30) + 1); } static unsigned long get_rate_ahb(struct clk *clk) { unsigned long cctl = readl(CRM_BASE + CCM_CCTL); return get_rate_arm(NULL) / (((cctl >> 28) & 0x3) + 1); } static unsigned long get_rate_ipg(struct clk *clk) { return get_rate_ahb(NULL) >> 1; } static unsigned long get_rate_per(int per) { unsigned long ofs = (per & 0x3) * 8; unsigned long reg = per & ~0x3; unsigned long val = (readl(CRM_BASE + CCM_PCDR0 + reg) >> ofs) & 0x3f; unsigned long fref; if (readl(CRM_BASE + 0x64) & (1 << per)) fref = get_rate_upll(); else fref = get_rate_ipg(NULL); return fref / (val + 1); } static unsigned long get_rate_uart(struct clk *clk) { return get_rate_per(15); } static unsigned long get_rate_i2c(struct clk *clk) { return get_rate_per(6); } static unsigned long get_rate_nfc(struct clk *clk) { return get_rate_per(8); } static unsigned long get_rate_otg(struct clk *clk) { return 48000000; /* FIXME */ } static int clk_cgcr_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_cgcr_disable(struct clk *clk) { u32 reg; reg = __raw_readl(clk->enable_reg); reg &= ~(1 << clk->enable_shift); __raw_writel(reg, clk->enable_reg); } #define DEFINE_CLOCK(name, i, er, es, gr, sr, s) \ static struct clk name = { \ .id = i, \ .enable_reg = CRM_BASE + er, \ .enable_shift = es, \ .get_rate = gr, \ .set_rate = sr, \ .enable = clk_cgcr_enable, \ .disable = clk_cgcr_disable, \ .secondary = s, \ } DEFINE_CLOCK(gpt_clk, 0, CCM_CGCR0, 5, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(cspi1_clk, 0, CCM_CGCR1, 5, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(cspi2_clk, 0, CCM_CGCR1, 6, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(cspi3_clk, 0, CCM_CGCR1, 7, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(uart1_clk, 0, CCM_CGCR2, 14, get_rate_uart, NULL, NULL); DEFINE_CLOCK(uart2_clk, 0, CCM_CGCR2, 15, get_rate_uart, NULL, NULL); DEFINE_CLOCK(uart3_clk, 0, CCM_CGCR2, 16, get_rate_uart, NULL, NULL); DEFINE_CLOCK(uart4_clk, 0, CCM_CGCR2, 17, get_rate_uart, NULL, NULL); DEFINE_CLOCK(uart5_clk, 0, CCM_CGCR2, 18, get_rate_uart, NULL, NULL); DEFINE_CLOCK(nfc_clk, 0, CCM_CGCR0, 8, get_rate_nfc, NULL, NULL); DEFINE_CLOCK(usbotg_clk, 0, CCM_CGCR0, 28, get_rate_otg, NULL, NULL); DEFINE_CLOCK(pwm1_clk, 0, CCM_CGCR1, 31, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(pwm2_clk, 0, CCM_CGCR2, 0, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(pwm3_clk, 0, CCM_CGCR2, 1, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(pwm4_clk, 0, CCM_CGCR2, 2, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(kpp_clk, 0, CCM_CGCR1, 28, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(tsc_clk, 0, CCM_CGCR2, 13, get_rate_ipg, NULL, NULL); DEFINE_CLOCK(i2c_clk, 0, CCM_CGCR0, 6, get_rate_i2c, NULL, NULL); DEFINE_CLOCK(fec_clk, 0, CCM_CGCR0, 23, get_rate_ipg, NULL, NULL); #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, uart1_clk) _REGISTER_CLOCK("imx-uart.1", NULL, uart2_clk) _REGISTER_CLOCK("imx-uart.2", NULL, uart3_clk) _REGISTER_CLOCK("imx-uart.3", NULL, uart4_clk) _REGISTER_CLOCK("imx-uart.4", NULL, uart5_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("mxc_nand.0", NULL, nfc_clk) _REGISTER_CLOCK("spi_imx.0", NULL, cspi1_clk) _REGISTER_CLOCK("spi_imx.1", NULL, cspi2_clk) _REGISTER_CLOCK("spi_imx.2", NULL, cspi3_clk) _REGISTER_CLOCK("mxc_pwm.0", NULL, pwm1_clk) _REGISTER_CLOCK("mxc_pwm.1", NULL, pwm2_clk) _REGISTER_CLOCK("mxc_pwm.2", NULL, pwm3_clk) _REGISTER_CLOCK("mxc_pwm.3", NULL, pwm4_clk) _REGISTER_CLOCK("mxc-keypad", NULL, kpp_clk) _REGISTER_CLOCK("mx25-adc", NULL, tsc_clk) _REGISTER_CLOCK("imx-i2c.0", NULL, i2c_clk) _REGISTER_CLOCK("imx-i2c.1", NULL, i2c_clk) _REGISTER_CLOCK("imx-i2c.2", NULL, i2c_clk) _REGISTER_CLOCK("fec.0", NULL, fec_clk) }; int __init mx25_clocks_init(unsigned long fref) { int i; for (i = 0; i < ARRAY_SIZE(lookups); i++) clkdev_add(&lookups[i]); mxc_timer_init(&gpt_clk, MX25_IO_ADDRESS(MX25_GPT1_BASE_ADDR), 54); return 0; }