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Diffstat (limited to 'arch/arm/mach-pxa/cpufreq-pxa3xx.c')
-rw-r--r--arch/arm/mach-pxa/cpufreq-pxa3xx.c258
1 files changed, 0 insertions, 258 deletions
diff --git a/arch/arm/mach-pxa/cpufreq-pxa3xx.c b/arch/arm/mach-pxa/cpufreq-pxa3xx.c
deleted file mode 100644
index b85b4ab7aac6..000000000000
--- a/arch/arm/mach-pxa/cpufreq-pxa3xx.c
+++ /dev/null
@@ -1,258 +0,0 @@
-/*
- * linux/arch/arm/mach-pxa/cpufreq-pxa3xx.c
- *
- * Copyright (C) 2008 Marvell International Ltd.
- *
- * 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.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/cpufreq.h>
-#include <linux/slab.h>
-#include <linux/io.h>
-
-#include <mach/pxa3xx-regs.h>
-
-#include "generic.h"
-
-#define HSS_104M (0)
-#define HSS_156M (1)
-#define HSS_208M (2)
-#define HSS_312M (3)
-
-#define SMCFS_78M (0)
-#define SMCFS_104M (2)
-#define SMCFS_208M (5)
-
-#define SFLFS_104M (0)
-#define SFLFS_156M (1)
-#define SFLFS_208M (2)
-#define SFLFS_312M (3)
-
-#define XSPCLK_156M (0)
-#define XSPCLK_NONE (3)
-
-#define DMCFS_26M (0)
-#define DMCFS_260M (3)
-
-struct pxa3xx_freq_info {
- unsigned int cpufreq_mhz;
- unsigned int core_xl : 5;
- unsigned int core_xn : 3;
- unsigned int hss : 2;
- unsigned int dmcfs : 2;
- unsigned int smcfs : 3;
- unsigned int sflfs : 2;
- unsigned int df_clkdiv : 3;
-
- int vcc_core; /* in mV */
- int vcc_sram; /* in mV */
-};
-
-#define OP(cpufreq, _xl, _xn, _hss, _dmc, _smc, _sfl, _dfi, vcore, vsram) \
-{ \
- .cpufreq_mhz = cpufreq, \
- .core_xl = _xl, \
- .core_xn = _xn, \
- .hss = HSS_##_hss##M, \
- .dmcfs = DMCFS_##_dmc##M, \
- .smcfs = SMCFS_##_smc##M, \
- .sflfs = SFLFS_##_sfl##M, \
- .df_clkdiv = _dfi, \
- .vcc_core = vcore, \
- .vcc_sram = vsram, \
-}
-
-static struct pxa3xx_freq_info pxa300_freqs[] = {
- /* CPU XL XN HSS DMEM SMEM SRAM DFI VCC_CORE VCC_SRAM */
- OP(104, 8, 1, 104, 260, 78, 104, 3, 1000, 1100), /* 104MHz */
- OP(208, 16, 1, 104, 260, 104, 156, 2, 1000, 1100), /* 208MHz */
- OP(416, 16, 2, 156, 260, 104, 208, 2, 1100, 1200), /* 416MHz */
- OP(624, 24, 2, 208, 260, 208, 312, 3, 1375, 1400), /* 624MHz */
-};
-
-static struct pxa3xx_freq_info pxa320_freqs[] = {
- /* CPU XL XN HSS DMEM SMEM SRAM DFI VCC_CORE VCC_SRAM */
- OP(104, 8, 1, 104, 260, 78, 104, 3, 1000, 1100), /* 104MHz */
- OP(208, 16, 1, 104, 260, 104, 156, 2, 1000, 1100), /* 208MHz */
- OP(416, 16, 2, 156, 260, 104, 208, 2, 1100, 1200), /* 416MHz */
- OP(624, 24, 2, 208, 260, 208, 312, 3, 1375, 1400), /* 624MHz */
- OP(806, 31, 2, 208, 260, 208, 312, 3, 1400, 1400), /* 806MHz */
-};
-
-static unsigned int pxa3xx_freqs_num;
-static struct pxa3xx_freq_info *pxa3xx_freqs;
-static struct cpufreq_frequency_table *pxa3xx_freqs_table;
-
-static int setup_freqs_table(struct cpufreq_policy *policy,
- struct pxa3xx_freq_info *freqs, int num)
-{
- struct cpufreq_frequency_table *table;
- int i;
-
- table = kzalloc((num + 1) * sizeof(*table), GFP_KERNEL);
- if (table == NULL)
- return -ENOMEM;
-
- for (i = 0; i < num; i++) {
- table[i].index = i;
- table[i].frequency = freqs[i].cpufreq_mhz * 1000;
- }
- table[num].index = i;
- table[num].frequency = CPUFREQ_TABLE_END;
-
- pxa3xx_freqs = freqs;
- pxa3xx_freqs_num = num;
- pxa3xx_freqs_table = table;
-
- return cpufreq_frequency_table_cpuinfo(policy, table);
-}
-
-static void __update_core_freq(struct pxa3xx_freq_info *info)
-{
- uint32_t mask = ACCR_XN_MASK | ACCR_XL_MASK;
- uint32_t accr = ACCR;
- uint32_t xclkcfg;
-
- accr &= ~(ACCR_XN_MASK | ACCR_XL_MASK | ACCR_XSPCLK_MASK);
- accr |= ACCR_XN(info->core_xn) | ACCR_XL(info->core_xl);
-
- /* No clock until core PLL is re-locked */
- accr |= ACCR_XSPCLK(XSPCLK_NONE);
-
- xclkcfg = (info->core_xn == 2) ? 0x3 : 0x2; /* turbo bit */
-
- ACCR = accr;
- __asm__("mcr p14, 0, %0, c6, c0, 0\n" : : "r"(xclkcfg));
-
- while ((ACSR & mask) != (accr & mask))
- cpu_relax();
-}
-
-static void __update_bus_freq(struct pxa3xx_freq_info *info)
-{
- uint32_t mask;
- uint32_t accr = ACCR;
-
- mask = ACCR_SMCFS_MASK | ACCR_SFLFS_MASK | ACCR_HSS_MASK |
- ACCR_DMCFS_MASK;
-
- accr &= ~mask;
- accr |= ACCR_SMCFS(info->smcfs) | ACCR_SFLFS(info->sflfs) |
- ACCR_HSS(info->hss) | ACCR_DMCFS(info->dmcfs);
-
- ACCR = accr;
-
- while ((ACSR & mask) != (accr & mask))
- cpu_relax();
-}
-
-static int pxa3xx_cpufreq_verify(struct cpufreq_policy *policy)
-{
- return cpufreq_frequency_table_verify(policy, pxa3xx_freqs_table);
-}
-
-static unsigned int pxa3xx_cpufreq_get(unsigned int cpu)
-{
- return pxa3xx_get_clk_frequency_khz(0);
-}
-
-static int pxa3xx_cpufreq_set(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation)
-{
- struct pxa3xx_freq_info *next;
- struct cpufreq_freqs freqs;
- unsigned long flags;
- int idx;
-
- if (policy->cpu != 0)
- return -EINVAL;
-
- /* Lookup the next frequency */
- if (cpufreq_frequency_table_target(policy, pxa3xx_freqs_table,
- target_freq, relation, &idx))
- return -EINVAL;
-
- next = &pxa3xx_freqs[idx];
-
- freqs.old = policy->cur;
- freqs.new = next->cpufreq_mhz * 1000;
- freqs.cpu = policy->cpu;
-
- pr_debug("CPU frequency from %d MHz to %d MHz%s\n",
- freqs.old / 1000, freqs.new / 1000,
- (freqs.old == freqs.new) ? " (skipped)" : "");
-
- if (freqs.old == target_freq)
- return 0;
-
- cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
-
- local_irq_save(flags);
- __update_core_freq(next);
- __update_bus_freq(next);
- local_irq_restore(flags);
-
- cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
-
- return 0;
-}
-
-static int pxa3xx_cpufreq_init(struct cpufreq_policy *policy)
-{
- int ret = -EINVAL;
-
- /* set default policy and cpuinfo */
- policy->cpuinfo.min_freq = 104000;
- policy->cpuinfo.max_freq = (cpu_is_pxa320()) ? 806000 : 624000;
- policy->cpuinfo.transition_latency = 1000; /* FIXME: 1 ms, assumed */
- policy->max = pxa3xx_get_clk_frequency_khz(0);
- policy->cur = policy->min = policy->max;
-
- if (cpu_is_pxa300() || cpu_is_pxa310())
- ret = setup_freqs_table(policy, ARRAY_AND_SIZE(pxa300_freqs));
-
- if (cpu_is_pxa320())
- ret = setup_freqs_table(policy, ARRAY_AND_SIZE(pxa320_freqs));
-
- if (ret) {
- pr_err("failed to setup frequency table\n");
- return ret;
- }
-
- pr_info("CPUFREQ support for PXA3xx initialized\n");
- return 0;
-}
-
-static struct cpufreq_driver pxa3xx_cpufreq_driver = {
- .verify = pxa3xx_cpufreq_verify,
- .target = pxa3xx_cpufreq_set,
- .init = pxa3xx_cpufreq_init,
- .get = pxa3xx_cpufreq_get,
- .name = "pxa3xx-cpufreq",
-};
-
-static int __init cpufreq_init(void)
-{
- if (cpu_is_pxa3xx())
- return cpufreq_register_driver(&pxa3xx_cpufreq_driver);
-
- return 0;
-}
-module_init(cpufreq_init);
-
-static void __exit cpufreq_exit(void)
-{
- cpufreq_unregister_driver(&pxa3xx_cpufreq_driver);
-}
-module_exit(cpufreq_exit);
-
-MODULE_DESCRIPTION("CPU frequency scaling driver for PXA3xx");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.0.4) at 2024-12-29 12:17:14 +0000