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Diffstat (limited to 'target/linux/ifxmips/files/arch/mips/ifxmips/cgu.c')
-rw-r--r--target/linux/ifxmips/files/arch/mips/ifxmips/cgu.c396
1 files changed, 396 insertions, 0 deletions
diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/cgu.c b/target/linux/ifxmips/files/arch/mips/ifxmips/cgu.c
new file mode 100644
index 0000000000..2f292a216b
--- /dev/null
+++ b/target/linux/ifxmips/files/arch/mips/ifxmips/cgu.c
@@ -0,0 +1,396 @@
+/*
+ * arch/mips/ifxmips/cgu.c
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) 2007 Xu Liang, infineon
+ *
+ * Rewrite of Infineon IFXMips code
+ * Copyright (C) 2008 John Crispin <blogic@openwrt.org>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/miscdevice.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
+#include <asm/irq.h>
+#include <asm/div64.h>
+#include <linux/errno.h>
+#include <asm/ifxmips/ifxmips.h>
+
+#define FIX_FOR_36M_CRYSTAL 1
+#define BASIC_INPUT_CLOCK_FREQUENCY_1 35328000
+#define BASIC_INPUT_CLOCK_FREQUENCY_2 36000000
+
+#define BASIS_INPUT_CRYSTAL_USB 12000000
+
+#define GET_BITS(x, msb, lsb) (((x) & ((1 << ((msb) + 1)) - 1)) >> (lsb))
+#define SET_BITS(x, msb, lsb, value) (((x) & ~(((1 << ((msb) + 1)) - 1) ^ ((1 << (lsb)) - 1))) | (((value) & ((1 << (1 + (msb) - (lsb))) - 1)) << (lsb)))
+
+#define CGU_PLL0_PHASE_DIVIDER_ENABLE (*IFXMIPS_CGU_PLL0_CFG & (1 << 31))
+#define CGU_PLL0_BYPASS (*IFXMIPS_CGU_PLL0_CFG & (1 << 30))
+#define CGU_PLL0_SRC (*IFXMIPS_CGU_PLL0_CFG & (1 << 29))
+#define CGU_PLL0_CFG_DSMSEL (*IFXMIPS_CGU_PLL0_CFG & (1 << 28))
+#define CGU_PLL0_CFG_FRAC_EN (*IFXMIPS_CGU_PLL0_CFG & (1 << 27))
+#define CGU_PLL0_CFG_PLLK GET_BITS(*IFXMIPS_CGU_PLL0_CFG, 26, 17)
+#define CGU_PLL0_CFG_PLLN GET_BITS(*IFXMIPS_CGU_PLL0_CFG, 12, 6)
+#define CGU_PLL0_CFG_PLLM GET_BITS(*IFXMIPS_CGU_PLL0_CFG, 5, 2)
+#define CGU_PLL1_SRC (*IFXMIPS_CGU_PLL1_CFG & (1 << 31))
+#define CGU_PLL1_BYPASS (*IFXMIPS_CGU_PLL1_CFG & (1 << 30))
+#define CGU_PLL1_CFG_DSMSEL (*IFXMIPS_CGU_PLL1_CFG & (1 << 28))
+#define CGU_PLL1_CFG_FRAC_EN (*IFXMIPS_CGU_PLL1_CFG & (1 << 27))
+#define CGU_PLL1_CFG_PLLK GET_BITS(*IFXMIPS_CGU_PLL1_CFG, 26, 17)
+#define CGU_PLL1_CFG_PLLN GET_BITS(*IFXMIPS_CGU_PLL1_CFG, 12, 6)
+#define CGU_PLL1_CFG_PLLM GET_BITS(*IFXMIPS_CGU_PLL1_CFG, 5, 2)
+#define CGU_PLL2_PHASE_DIVIDER_ENABLE (*IFXMIPS_CGU_PLL2_CFG & (1 << 20))
+#define CGU_PLL2_BYPASS (*IFXMIPS_CGU_PLL2_CFG & (1 << 19))
+#define CGU_PLL2_SRC GET_BITS(*IFXMIPS_CGU_PLL2_CFG, 18, 17)
+#define CGU_PLL2_CFG_INPUT_DIV GET_BITS(*IFXMIPS_CGU_PLL2_CFG, 16, 13)
+#define CGU_PLL2_CFG_PLLN GET_BITS(*IFXMIPS_CGU_PLL2_CFG, 12, 6)
+#define CGU_PLL2_CFG_PLLM GET_BITS(*IFXMIPS_CGU_PLL2_CFG, 5, 2)
+#define CGU_SYS_PPESEL GET_BITS(*IFXMIPS_CGU_SYS, 8, 7)
+#define CGU_SYS_FPI_SEL (*IFXMIPS_CGU_SYS & (1 << 6))
+#define CGU_SYS_CPU1SEL GET_BITS(*IFXMIPS_CGU_SYS, 5, 4)
+#define CGU_SYS_CPU0SEL GET_BITS(*IFXMIPS_CGU_SYS, 3, 2)
+#define CGU_SYS_DDR_SEL GET_BITS(*IFXMIPS_CGU_SYS, 1, 0)
+#define CGU_IF_CLK_PCI_CLK GET_BITS(*IFXMIPS_CGU_IF_CLK, 23, 20)
+#define CGU_IF_CLK_USBSEL GET_BITS(*IFXMIPS_CGU_IF_CLK, 5, 4)
+#define CGU_IF_CLK_MIISEL GET_BITS(*IFXMIPS_CGU_IF_CLK, 1, 0)
+
+static u32 cgu_get_pll0_fdiv(void);
+
+static inline u32 get_input_clock(int pll)
+{
+ switch(pll)
+ {
+ case 0:
+ if(CGU_PLL0_SRC)
+ return BASIS_INPUT_CRYSTAL_USB;
+ else if(CGU_PLL0_PHASE_DIVIDER_ENABLE)
+ return BASIC_INPUT_CLOCK_FREQUENCY_1;
+ else
+ return BASIC_INPUT_CLOCK_FREQUENCY_2;
+ case 1:
+ if(CGU_PLL1_SRC)
+ return BASIS_INPUT_CRYSTAL_USB;
+ else if(CGU_PLL0_PHASE_DIVIDER_ENABLE)
+ return BASIC_INPUT_CLOCK_FREQUENCY_1;
+ else
+ return BASIC_INPUT_CLOCK_FREQUENCY_2;
+ case 2:
+ switch(CGU_PLL2_SRC)
+ {
+ case 0:
+ return cgu_get_pll0_fdiv();
+ case 1:
+ return CGU_PLL2_PHASE_DIVIDER_ENABLE ? BASIC_INPUT_CLOCK_FREQUENCY_1 : BASIC_INPUT_CLOCK_FREQUENCY_2;
+ case 2:
+ return BASIS_INPUT_CRYSTAL_USB;
+ }
+ default:
+ return 0;
+ }
+}
+
+static inline u32
+cal_dsm(int pll, u32 num, u32 den)
+{
+ u64 res, clock = get_input_clock(pll);
+
+ res = num * clock;
+ do_div(res, den);
+ return res;
+}
+
+static inline u32
+mash_dsm(int pll, u32 M, u32 N, u32 K)
+{
+ u32 num = ((N + 1) << 10) + K;
+ u32 den = (M + 1) << 10;
+
+ return cal_dsm(pll, num, den);
+}
+
+static inline u32 ssff_dsm_1(int pll, u32 M, u32 N, u32 K)
+{
+ u32 num = ((N + 1) << 11) + K + 512;
+ u32 den = (M + 1) << 11;
+
+ return cal_dsm(pll, num, den);
+}
+
+static inline u32 ssff_dsm_2(int pll, u32 M, u32 N, u32 K)
+{
+ u32 num = K >= 512 ? ((N + 1) << 12) + K - 512 : ((N + 1) << 12) + K + 3584;
+ u32 den = (M + 1) << 12;
+
+ return cal_dsm(pll, num, den);
+}
+
+static inline u32 dsm(int pll, u32 M, u32 N, u32 K, u32 dsmsel, u32 phase_div_en)
+{
+ if ( !dsmsel )
+ return mash_dsm(pll, M, N, K);
+ else if ( !phase_div_en )
+ return mash_dsm(pll, M, N, K);
+ else
+ return ssff_dsm_2(pll, M, N, K);
+}
+
+static inline u32 cgu_get_pll0_fosc(void)
+{
+ if(CGU_PLL0_BYPASS)
+ return get_input_clock(0);
+ else
+ return !CGU_PLL0_CFG_FRAC_EN
+ ? dsm(0, CGU_PLL0_CFG_PLLM, CGU_PLL0_CFG_PLLN, 0, CGU_PLL0_CFG_DSMSEL, CGU_PLL0_PHASE_DIVIDER_ENABLE)
+ : dsm(0, CGU_PLL0_CFG_PLLM, CGU_PLL0_CFG_PLLN, CGU_PLL0_CFG_PLLK, CGU_PLL0_CFG_DSMSEL, CGU_PLL0_PHASE_DIVIDER_ENABLE);
+}
+
+static inline u32 cgu_get_pll0_fps(int phase)
+{
+ register u32 fps = cgu_get_pll0_fosc();
+
+ switch ( phase )
+ {
+ case 1:
+ /* 1.25 */
+ fps = ((fps << 2) + 2) / 5;
+ break;
+ case 2:
+ /* 1.5 */
+ fps = ((fps << 1) + 1) / 3;
+ break;
+ }
+ return fps;
+}
+
+static u32 cgu_get_pll0_fdiv(void)
+{
+ register u32 div = CGU_PLL2_CFG_INPUT_DIV + 1;
+
+ return (cgu_get_pll0_fosc() + (div >> 1)) / div;
+}
+
+static inline u32 cgu_get_pll1_fosc(void)
+{
+ if(CGU_PLL1_BYPASS)
+ return get_input_clock(1);
+ else
+ return !CGU_PLL1_CFG_FRAC_EN
+ ? dsm(1, CGU_PLL1_CFG_PLLM, CGU_PLL1_CFG_PLLN, 0, CGU_PLL1_CFG_DSMSEL, 0)
+ : dsm(1, CGU_PLL1_CFG_PLLM, CGU_PLL1_CFG_PLLN, CGU_PLL1_CFG_PLLK, CGU_PLL1_CFG_DSMSEL, 0);
+}
+
+static inline u32 cgu_get_pll1_fps(void)
+{
+ register u32 fps = cgu_get_pll1_fosc();
+
+ return ((fps << 1) + 1) / 3;
+}
+
+static inline u32 cgu_get_pll1_fdiv(void)
+{
+ return cgu_get_pll1_fosc();
+}
+
+static inline u32 cgu_get_pll2_fosc(void)
+{
+ u64 res, clock = get_input_clock(2);
+
+ if ( CGU_PLL2_BYPASS )
+ return get_input_clock(2);
+
+ res = (CGU_PLL2_CFG_PLLN + 1) * clock;
+ do_div(res, CGU_PLL2_CFG_PLLM + 1);
+
+ return res;
+}
+
+static inline u32 cgu_get_pll2_fps(int phase)
+{
+ register u32 fps = cgu_get_pll2_fosc();
+
+ switch ( phase )
+ {
+ case 1:
+ /* 1.125 */
+ fps = ((fps << 2) + 2) / 5; break;
+ case 2:
+ /* 1.25 */
+ fps = ((fps << 3) + 4) / 9;
+ }
+
+ return fps;
+}
+
+static inline u32 cgu_get_pll2_fdiv(void)
+{
+ register u32 div = CGU_IF_CLK_PCI_CLK + 1;
+ return (cgu_get_pll2_fosc() + (div >> 1)) / div;
+}
+
+u32 cgu_get_mips_clock(int cpu)
+{
+ register u32 ret = cgu_get_pll0_fosc();
+ register u32 cpusel = cpu == 0 ? CGU_SYS_CPU0SEL : CGU_SYS_CPU1SEL;
+
+ if ( cpusel == 0 )
+ return ret;
+ else if ( cpusel == 2 )
+ ret <<= 1;
+
+ switch ( CGU_SYS_DDR_SEL )
+ {
+ default:
+ case 0:
+ return (ret + 1) / 2;
+ case 1:
+ return (ret * 2 + 2) / 5;
+ case 2:
+ return (ret + 1) / 3;
+ case 3:
+ return (ret + 2) / 4;
+ }
+}
+
+u32 cgu_get_cpu_clock(void)
+{
+ return cgu_get_mips_clock(0);
+}
+
+u32 cgu_get_io_region_clock(void)
+{
+ register u32 ret = cgu_get_pll0_fosc();
+
+ switch ( CGU_SYS_DDR_SEL )
+ {
+ default:
+ case 0:
+ return (ret + 1) / 2;
+ case 1:
+ return (ret * 2 + 2) / 5;
+ case 2:
+ return (ret + 1) / 3;
+ case 3:
+ return (ret + 2) / 4;
+ }
+}
+
+u32 cgu_get_fpi_bus_clock(int fpi)
+{
+ register u32 ret = cgu_get_io_region_clock();
+
+ if((fpi == 2) && (CGU_SYS_FPI_SEL))
+ ret >>= 1;
+
+ return ret;
+}
+
+u32 cgu_get_pp32_clock(void)
+{
+ switch ( CGU_SYS_PPESEL )
+ {
+ default:
+ case 0:
+ return cgu_get_pll2_fps(1);
+ case 1:
+ return cgu_get_pll2_fps(2);
+ case 2:
+ return (cgu_get_pll2_fps(1) + 1) >> 1;
+ case 3:
+ return (cgu_get_pll2_fps(2) + 1) >> 1;
+ }
+}
+
+u32 cgu_get_ethernet_clock(int mii)
+{
+ switch ( CGU_IF_CLK_MIISEL )
+ {
+ case 0:
+ return (cgu_get_pll2_fosc() + 3) / 12;
+ case 1:
+ return (cgu_get_pll2_fosc() + 3) / 6;
+ case 2:
+ return 50000000;
+ case 3:
+ return 25000000;
+ }
+ return 0;
+}
+
+u32 cgu_get_usb_clock(void)
+{
+ switch ( CGU_IF_CLK_USBSEL )
+ {
+ case 0:
+ return (cgu_get_pll2_fosc() + 12) / 25;
+ case 1:
+ return 12000000;
+ case 2:
+ return 12000000 / 4;
+ case 3:
+ return 12000000;
+ }
+ return 0;
+}
+
+u32 cgu_get_clockout(int clkout)
+{
+ u32 fosc1 = cgu_get_pll1_fosc();
+ u32 fosc2 = cgu_get_pll2_fosc();
+
+ if ( clkout > 3 || clkout < 0 )
+ return 0;
+
+ switch ( ((u32)clkout << 2) | GET_BITS(*IFXMIPS_CGU_IF_CLK, 15 - clkout * 2, 14 - clkout * 2) )
+ {
+ case 0: /* 32.768KHz */
+ case 15:
+ return (fosc1 + 6000) / 12000;
+ case 1: /* 1.536MHz */
+ return (fosc1 + 128) / 256;
+ case 2: /* 2.5MHz */
+ return (fosc2 + 60) / 120;
+ case 3: /* 12MHz */
+ case 5:
+ case 12:
+ return (fosc2 + 12) / 25;
+ case 4: /* 40MHz */
+ return (cgu_get_pll2_fps(2) + 3) / 6;
+ case 6: /* 24MHz */
+ return (cgu_get_pll2_fps(2) + 5) / 10;
+ case 7: /* 48MHz */
+ return (cgu_get_pll2_fps(2) + 2) / 5;
+ case 8: /* 25MHz */
+ case 14:
+ return (fosc2 + 6) / 12;
+ case 9: /* 50MHz */
+ case 13:
+ return (fosc2 + 3) / 6;
+ case 10:/* 30MHz */
+ return (fosc2 + 5) / 10;
+ case 11:/* 60MHz */
+ return (fosc2 + 2) / 5;
+ }
+
+ return 0;
+}
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