/* linux/arch/arm/mach-s5p64x0/clock-s5p6450.c * * Copyright (c) 2010 Samsung Electronics Co., Ltd. * http://www.samsung.com * * S5P6450 - Clock support * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include static struct clksrc_clk clk_mout_dpll = { .clk = { .name = "mout_dpll", }, .sources = &clk_src_dpll, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 5, .size = 1 }, }; static u32 epll_div[][5] = { { 133000000, 27307, 55, 2, 2 }, { 100000000, 43691, 41, 2, 2 }, { 480000000, 0, 80, 2, 0 }, }; static int s5p6450_epll_set_rate(struct clk *clk, unsigned long rate) { unsigned int epll_con, epll_con_k; unsigned int i; if (clk->rate == rate) /* Return if nothing changed */ return 0; epll_con = __raw_readl(S5P64X0_EPLL_CON); epll_con_k = __raw_readl(S5P64X0_EPLL_CON_K); epll_con_k &= ~(PLL90XX_KDIV_MASK); epll_con &= ~(PLL90XX_MDIV_MASK | PLL90XX_PDIV_MASK | PLL90XX_SDIV_MASK); for (i = 0; i < ARRAY_SIZE(epll_div); i++) { if (epll_div[i][0] == rate) { epll_con_k |= (epll_div[i][1] << PLL90XX_KDIV_SHIFT); epll_con |= (epll_div[i][2] << PLL90XX_MDIV_SHIFT) | (epll_div[i][3] << PLL90XX_PDIV_SHIFT) | (epll_div[i][4] << PLL90XX_SDIV_SHIFT); break; } } if (i == ARRAY_SIZE(epll_div)) { printk(KERN_ERR "%s: Invalid Clock EPLL Frequency\n", __func__); return -EINVAL; } __raw_writel(epll_con, S5P64X0_EPLL_CON); __raw_writel(epll_con_k, S5P64X0_EPLL_CON_K); printk(KERN_WARNING "EPLL Rate changes from %lu to %lu\n", clk->rate, rate); clk->rate = rate; return 0; } static struct clk_ops s5p6450_epll_ops = { .get_rate = s5p_epll_get_rate, .set_rate = s5p6450_epll_set_rate, }; static struct clksrc_clk clk_dout_epll = { .clk = { .name = "dout_epll", .parent = &clk_mout_epll.clk, }, .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 24, .size = 4 }, }; static struct clksrc_clk clk_mout_hclk_sel = { .clk = { .name = "mout_hclk_sel", }, .sources = &clkset_hclk_low, .reg_src = { .reg = S5P64X0_OTHERS, .shift = 15, .size = 1 }, }; static struct clk *clkset_hclk_list[] = { &clk_mout_hclk_sel.clk, &clk_armclk.clk, }; static struct clksrc_sources clkset_hclk = { .sources = clkset_hclk_list, .nr_sources = ARRAY_SIZE(clkset_hclk_list), }; static struct clksrc_clk clk_hclk = { .clk = { .name = "clk_hclk", }, .sources = &clkset_hclk, .reg_src = { .reg = S5P64X0_OTHERS, .shift = 14, .size = 1 }, .reg_div = { .reg = S5P64X0_CLK_DIV0, .shift = 8, .size = 4 }, }; static struct clksrc_clk clk_pclk = { .clk = { .name = "clk_pclk", .parent = &clk_hclk.clk, }, .reg_div = { .reg = S5P64X0_CLK_DIV0, .shift = 12, .size = 4 }, }; static struct clksrc_clk clk_dout_pwm_ratio0 = { .clk = { .name = "clk_dout_pwm_ratio0", .parent = &clk_mout_hclk_sel.clk, }, .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 16, .size = 4 }, }; static struct clksrc_clk clk_pclk_to_wdt_pwm = { .clk = { .name = "clk_pclk_to_wdt_pwm", .parent = &clk_dout_pwm_ratio0.clk, }, .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 20, .size = 4 }, }; static struct clksrc_clk clk_hclk_low = { .clk = { .name = "clk_hclk_low", }, .sources = &clkset_hclk_low, .reg_src = { .reg = S5P64X0_OTHERS, .shift = 6, .size = 1 }, .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 8, .size = 4 }, }; static struct clksrc_clk clk_pclk_low = { .clk = { .name = "clk_pclk_low", .parent = &clk_hclk_low.clk, }, .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 12, .size = 4 }, }; /* * The following clocks will be disabled during clock initialization. It is * recommended to keep the following clocks disabled until the driver requests * for enabling the clock. */ static struct clk init_clocks_off[] = { { .name = "usbhost", .parent = &clk_hclk_low.clk, .enable = s5p64x0_hclk0_ctrl, .ctrlbit = (1 << 3), }, { .name = "dma", .devname = "dma-pl330", .parent = &clk_hclk_low.clk, .enable = s5p64x0_hclk0_ctrl, .ctrlbit = (1 << 12), }, { .name = "hsmmc", .devname = "s3c-sdhci.0", .parent = &clk_hclk_low.clk, .enable = s5p64x0_hclk0_ctrl, .ctrlbit = (1 << 17), }, { .name = "hsmmc", .devname = "s3c-sdhci.1", .parent = &clk_hclk_low.clk, .enable = s5p64x0_hclk0_ctrl, .ctrlbit = (1 << 18), }, { .name = "hsmmc", .devname = "s3c-sdhci.2", .parent = &clk_hclk_low.clk, .enable = s5p64x0_hclk0_ctrl, .ctrlbit = (1 << 19), }, { .name = "usbotg", .parent = &clk_hclk_low.clk, .enable = s5p64x0_hclk0_ctrl, .ctrlbit = (1 << 20), }, { .name = "lcd", .parent = &clk_h, .enable = s5p64x0_hclk1_ctrl, .ctrlbit = (1 << 1), }, { .name = "watchdog", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 5), }, { .name = "rtc", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 6), }, { .name = "adc", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 12), }, { .name = "i2c", .devname = "s3c2440-i2c.0", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 17), }, { .name = "spi", .devname = "s3c64xx-spi.0", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 21), }, { .name = "spi", .devname = "s3c64xx-spi.1", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 22), }, { .name = "iis", .devname = "samsung-i2s.0", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 26), }, { .name = "iis", .devname = "samsung-i2s.1", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 15), }, { .name = "iis", .devname = "samsung-i2s.2", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 16), }, { .name = "i2c", .devname = "s3c2440-i2c.1", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 27), }, { .name = "dmc0", .parent = &clk_pclk.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 30), } }; /* * The following clocks will be enabled during clock initialization. */ static struct clk init_clocks[] = { { .name = "intc", .parent = &clk_hclk.clk, .enable = s5p64x0_hclk0_ctrl, .ctrlbit = (1 << 1), }, { .name = "mem", .parent = &clk_hclk.clk, .enable = s5p64x0_hclk0_ctrl, .ctrlbit = (1 << 21), }, { .name = "uart", .devname = "s3c6400-uart.0", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 1), }, { .name = "uart", .devname = "s3c6400-uart.1", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 2), }, { .name = "uart", .devname = "s3c6400-uart.2", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 3), }, { .name = "uart", .devname = "s3c6400-uart.3", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 4), }, { .name = "timers", .parent = &clk_pclk_to_wdt_pwm.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 7), }, { .name = "gpio", .parent = &clk_pclk_low.clk, .enable = s5p64x0_pclk_ctrl, .ctrlbit = (1 << 18), }, }; static struct clk *clkset_uart_list[] = { &clk_dout_epll.clk, &clk_dout_mpll.clk, }; static struct clksrc_sources clkset_uart = { .sources = clkset_uart_list, .nr_sources = ARRAY_SIZE(clkset_uart_list), }; static struct clk *clkset_mali_list[] = { &clk_mout_epll.clk, &clk_mout_apll.clk, &clk_mout_mpll.clk, }; static struct clksrc_sources clkset_mali = { .sources = clkset_mali_list, .nr_sources = ARRAY_SIZE(clkset_mali_list), }; static struct clk *clkset_group2_list[] = { &clk_dout_epll.clk, &clk_dout_mpll.clk, &clk_ext_xtal_mux, }; static struct clksrc_sources clkset_group2 = { .sources = clkset_group2_list, .nr_sources = ARRAY_SIZE(clkset_group2_list), }; static struct clk *clkset_dispcon_list[] = { &clk_dout_epll.clk, &clk_dout_mpll.clk, &clk_ext_xtal_mux, &clk_mout_dpll.clk, }; static struct clksrc_sources clkset_dispcon = { .sources = clkset_dispcon_list, .nr_sources = ARRAY_SIZE(clkset_dispcon_list), }; static struct clk *clkset_hsmmc44_list[] = { &clk_dout_epll.clk, &clk_dout_mpll.clk, &clk_ext_xtal_mux, &s5p_clk_27m, &clk_48m, }; static struct clksrc_sources clkset_hsmmc44 = { .sources = clkset_hsmmc44_list, .nr_sources = ARRAY_SIZE(clkset_hsmmc44_list), }; static struct clk *clkset_sclk_audio0_list[] = { [0] = &clk_dout_epll.clk, [1] = &clk_dout_mpll.clk, [2] = &clk_ext_xtal_mux, [3] = NULL, [4] = NULL, }; static struct clksrc_sources clkset_sclk_audio0 = { .sources = clkset_sclk_audio0_list, .nr_sources = ARRAY_SIZE(clkset_sclk_audio0_list), }; static struct clksrc_clk clk_sclk_audio0 = { .clk = { .name = "audio-bus", .enable = s5p64x0_sclk_ctrl, .ctrlbit = (1 << 8), .parent = &clk_dout_epll.clk, }, .sources = &clkset_sclk_audio0, .reg_src = { .reg = S5P64X0_CLK_SRC1, .shift = 10, .size = 3 }, .reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 8, .size = 4 }, }; static struct clksrc_clk clksrcs[] = { { .clk = { .name = "sclk_mmc", .devname = "s3c-sdhci.0", .ctrlbit = (1 << 24), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_group2, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 18, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 0, .size = 4 }, }, { .clk = { .name = "sclk_mmc", .devname = "s3c-sdhci.1", .ctrlbit = (1 << 25), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_group2, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 20, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 4, .size = 4 }, }, { .clk = { .name = "sclk_mmc", .devname = "s3c-sdhci.2", .ctrlbit = (1 << 26), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_group2, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 22, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 8, .size = 4 }, }, { .clk = { .name = "sclk_spi", .devname = "s3c64xx-spi.0", .ctrlbit = (1 << 20), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_group2, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 14, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 0, .size = 4 }, }, { .clk = { .name = "sclk_spi", .devname = "s3c64xx-spi.1", .ctrlbit = (1 << 21), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_group2, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 16, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 4, .size = 4 }, }, { .clk = { .name = "sclk_fimc", .ctrlbit = (1 << 10), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_group2, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 26, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 12, .size = 4 }, }, { .clk = { .name = "aclk_mali", .ctrlbit = (1 << 2), .enable = s5p64x0_sclk1_ctrl, }, .sources = &clkset_mali, .reg_src = { .reg = S5P64X0_CLK_SRC1, .shift = 8, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 4, .size = 4 }, }, { .clk = { .name = "sclk_2d", .ctrlbit = (1 << 12), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_mali, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 30, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 20, .size = 4 }, }, { .clk = { .name = "sclk_usi", .ctrlbit = (1 << 7), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_group2, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 10, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 16, .size = 4 }, }, { .clk = { .name = "sclk_camif", .ctrlbit = (1 << 6), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_group2, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 28, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 20, .size = 4 }, }, { .clk = { .name = "sclk_dispcon", .ctrlbit = (1 << 1), .enable = s5p64x0_sclk1_ctrl, }, .sources = &clkset_dispcon, .reg_src = { .reg = S5P64X0_CLK_SRC1, .shift = 4, .size = 2 }, .reg_div = { .reg = S5P64X0_CLK_DIV3, .shift = 0, .size = 4 }, }, { .clk = { .name = "sclk_hsmmc44", .ctrlbit = (1 << 30), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_hsmmc44, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 6, .size = 3 }, .reg_div = { .reg = S5P64X0_CLK_DIV1, .shift = 28, .size = 4 }, }, }; static struct clksrc_clk clk_sclk_uclk = { .clk = { .name = "uclk1", .ctrlbit = (1 << 5), .enable = s5p64x0_sclk_ctrl, }, .sources = &clkset_uart, .reg_src = { .reg = S5P64X0_CLK_SRC0, .shift = 13, .size = 1 }, .reg_div = { .reg = S5P64X0_CLK_DIV2, .shift = 16, .size = 4 }, }; static struct clksrc_clk *clksrc_cdev[] = { &clk_sclk_uclk, }; static struct clk_lookup s5p6450_clk_lookup[] = { CLKDEV_INIT(NULL, "clk_uart_baud2", &clk_pclk_low.clk), CLKDEV_INIT(NULL, "clk_uart_baud3", &clk_sclk_uclk.clk), }; /* Clock initialization code */ static struct clksrc_clk *sysclks[] = { &clk_mout_apll, &clk_mout_epll, &clk_dout_epll, &clk_mout_mpll, &clk_dout_mpll, &clk_armclk, &clk_mout_hclk_sel, &clk_dout_pwm_ratio0, &clk_pclk_to_wdt_pwm, &clk_hclk, &clk_pclk, &clk_hclk_low, &clk_pclk_low, &clk_sclk_audio0, }; static struct clk dummy_apb_pclk = { .name = "apb_pclk", .id = -1, }; void __init_or_cpufreq s5p6450_setup_clocks(void) { struct clk *xtal_clk; unsigned long xtal; unsigned long fclk; unsigned long hclk; unsigned long hclk_low; unsigned long pclk; unsigned long pclk_low; unsigned long apll; unsigned long mpll; unsigned long epll; unsigned long dpll; unsigned int ptr; /* Set S5P6450 functions for clk_fout_epll */ clk_fout_epll.enable = s5p_epll_enable; clk_fout_epll.ops = &s5p6450_epll_ops; clk_48m.enable = s5p64x0_clk48m_ctrl; xtal_clk = clk_get(NULL, "ext_xtal"); BUG_ON(IS_ERR(xtal_clk)); xtal = clk_get_rate(xtal_clk); clk_put(xtal_clk); apll = s5p_get_pll45xx(xtal, __raw_readl(S5P64X0_APLL_CON), pll_4502); mpll = s5p_get_pll45xx(xtal, __raw_readl(S5P64X0_MPLL_CON), pll_4502); epll = s5p_get_pll90xx(xtal, __raw_readl(S5P64X0_EPLL_CON), __raw_readl(S5P64X0_EPLL_CON_K)); dpll = s5p_get_pll46xx(xtal, __raw_readl(S5P6450_DPLL_CON), __raw_readl(S5P6450_DPLL_CON_K), pll_4650c); clk_fout_apll.rate = apll; clk_fout_mpll.rate = mpll; clk_fout_epll.rate = epll; clk_fout_dpll.rate = dpll; printk(KERN_INFO "S5P6450: PLL settings, A=%ld.%ldMHz, M=%ld.%ldMHz," \ " E=%ld.%ldMHz, D=%ld.%ldMHz\n", print_mhz(apll), print_mhz(mpll), print_mhz(epll), print_mhz(dpll)); fclk = clk_get_rate(&clk_armclk.clk); hclk = clk_get_rate(&clk_hclk.clk); pclk = clk_get_rate(&clk_pclk.clk); hclk_low = clk_get_rate(&clk_hclk_low.clk); pclk_low = clk_get_rate(&clk_pclk_low.clk); printk(KERN_INFO "S5P6450: HCLK=%ld.%ldMHz, HCLK_LOW=%ld.%ldMHz," \ " PCLK=%ld.%ldMHz, PCLK_LOW=%ld.%ldMHz\n", print_mhz(hclk), print_mhz(hclk_low), print_mhz(pclk), print_mhz(pclk_low)); clk_f.rate = fclk; clk_h.rate = hclk; clk_p.rate = pclk; for (ptr = 0; ptr < ARRAY_SIZE(clksrcs); ptr++) s3c_set_clksrc(&clksrcs[ptr], true); } void __init s5p6450_register_clocks(void) { int ptr; for (ptr = 0; ptr < ARRAY_SIZE(sysclks); ptr++) s3c_register_clksrc(sysclks[ptr], 1); s3c_register_clksrc(clksrcs, ARRAY_SIZE(clksrcs)); s3c_register_clocks(init_clocks, ARRAY_SIZE(init_clocks)); for (ptr = 0; ptr < ARRAY_SIZE(clksrc_cdev); ptr++) s3c_register_clksrc(clksrc_cdev[ptr], 1); s3c_register_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off)); s3c_disable_clocks(init_clocks_off, ARRAY_SIZE(init_clocks_off)); clkdev_add_table(s5p6450_clk_lookup, ARRAY_SIZE(s5p6450_clk_lookup)); s3c24xx_register_clock(&dummy_apb_pclk); s3c_pwmclk_init(); }