1 files changed, 0 insertions, 478 deletions
diff --git a/arch/arm/plat-s3c24xx/s3c2410-iotiming.c b/arch/arm/plat-s3c24xx/s3c2410-iotiming.c
deleted file mode 100644
index b1908e56da1b..000000000000
--- a/arch/arm/plat-s3c24xx/s3c2410-iotiming.c
+++ /dev/null
@@ -1,478 +0,0 @@
-/* linux/arch/arm/plat-s3c24xx/s3c2410-iotiming.c
- *
- * Copyright (c) 2006-2009 Simtec Electronics
- *	http://armlinux.simtec.co.uk/
- *	Ben Dooks <ben@simtec.co.uk>
- *
- * S3C24XX CPU Frequency scaling - IO timing for S3C2410/S3C2440/S3C2442
- *
- * 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 <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/cpufreq.h>
-#include <linux/seq_file.h>
-#include <linux/io.h>
-#include <linux/slab.h>
-
-#include <mach/map.h>
-#include <mach/regs-mem.h>
-#include <mach/regs-clock.h>
-
-#include <plat/cpu-freq-core.h>
-
-#define print_ns(x) ((x) / 10), ((x) % 10)
-
-/**
- * s3c2410_print_timing - print bank timing data for debug purposes
- * @pfx: The prefix to put on the output
- * @timings: The timing inforamtion to print.
-*/
-static void s3c2410_print_timing(const char *pfx,
-				 struct s3c_iotimings *timings)
-{
-	struct s3c2410_iobank_timing *bt;
-	int bank;
-
-	for (bank = 0; bank < MAX_BANKS; bank++) {
-		bt = timings->bank[bank].io_2410;
-		if (!bt)
-			continue;
-
-		printk(KERN_DEBUG "%s %d: Tacs=%d.%d, Tcos=%d.%d, Tacc=%d.%d, "
-		       "Tcoh=%d.%d, Tcah=%d.%d\n", pfx, bank,
-		       print_ns(bt->tacs),
-		       print_ns(bt->tcos),
-		       print_ns(bt->tacc),
-		       print_ns(bt->tcoh),
-		       print_ns(bt->tcah));
-	}
-}
-
-/**
- * bank_reg - convert bank number to pointer to the control register.
- * @bank: The IO bank number.
- */
-static inline void __iomem *bank_reg(unsigned int bank)
-{
-	return S3C2410_BANKCON0 + (bank << 2);
-}
-
-/**
- * bank_is_io - test whether bank is used for IO
- * @bankcon: The bank control register.
- *
- * This is a simplistic test to see if any BANKCON[x] is not an IO
- * bank. It currently does not take into account whether BWSCON has
- * an illegal width-setting in it, or if the pin connected to nCS[x]
- * is actually being handled as a chip-select.
- */
-static inline int bank_is_io(unsigned long bankcon)
-{
-	return !(bankcon & S3C2410_BANKCON_SDRAM);
-}
-
-/**
- * to_div - convert cycle time to divisor
- * @cyc: The cycle time, in 10ths of nanoseconds.
- * @hclk_tns: The cycle time for HCLK, in 10ths of nanoseconds.
- *
- * Convert the given cycle time into the divisor to use to obtain it from
- * HCLK.
-*/
-static inline unsigned int to_div(unsigned int cyc, unsigned int hclk_tns)
-{
-	if (cyc == 0)
-		return 0;
-
-	return DIV_ROUND_UP(cyc, hclk_tns);
-}
-
-/**
- * calc_0124 - calculate divisor control for divisors that do /0, /1. /2 and /4
- * @cyc: The cycle time, in 10ths of nanoseconds.
- * @hclk_tns: The cycle time for HCLK, in 10ths of nanoseconds.
- * @v: Pointer to register to alter.
- * @shift: The shift to get to the control bits.
- *
- * Calculate the divisor, and turn it into the correct control bits to
- * set in the result, @v.
- */
-static unsigned int calc_0124(unsigned int cyc, unsigned long hclk_tns,
-			      unsigned long *v, int shift)
-{
-	unsigned int div = to_div(cyc, hclk_tns);
-	unsigned long val;
-
-	s3c_freq_iodbg("%s: cyc=%d, hclk=%lu, shift=%d => div %d\n",
-		       __func__, cyc, hclk_tns, shift, div);
-
-	switch (div) {
-	case 0:
-		val = 0;
-		break;
-	case 1:
-		val = 1;
-		break;
-	case 2:
-		val = 2;
-		break;
-	case 3:
-	case 4:
-		val = 3;
-		break;
-	default:
-		return -1;
-	}
-
-	*v |= val << shift;
-	return 0;
-}
-
-int calc_tacp(unsigned int cyc, unsigned long hclk, unsigned long *v)
-{
-	/* Currently no support for Tacp calculations. */
-	return 0;
-}
-
-/**
- * calc_tacc - calculate divisor control for tacc.
- * @cyc: The cycle time, in 10ths of nanoseconds.
- * @nwait_en: IS nWAIT enabled for this bank.
- * @hclk_tns: The cycle time for HCLK, in 10ths of nanoseconds.
- * @v: Pointer to register to alter.
- *
- * Calculate the divisor control for tACC, taking into account whether
- * the bank has nWAIT enabled. The result is used to modify the value
- * pointed to by @v.
-*/
-static int calc_tacc(unsigned int cyc, int nwait_en,
-		     unsigned long hclk_tns, unsigned long *v)
-{
-	unsigned int div = to_div(cyc, hclk_tns);
-	unsigned long val;
-
-	s3c_freq_iodbg("%s: cyc=%u, nwait=%d, hclk=%lu => div=%u\n",
-		       __func__, cyc, nwait_en, hclk_tns, div);
-
-	/* if nWait enabled on an bank, Tacc must be at-least 4 cycles. */
-	if (nwait_en && div < 4)
-		div = 4;
-
-	switch (div) {
-	case 0:
-		val = 0;
-		break;
-
-	case 1:
-	case 2:
-	case 3:
-	case 4:
-		val = div - 1;
-		break;
-
-	case 5:
-	case 6:
-		val = 4;
-		break;
-
-	case 7:
-	case 8:
-		val = 5;
-		break;
-
-	case 9:
-	case 10:
-		val = 6;
-		break;
-
-	case 11:
-	case 12:
-	case 13:
-	case 14:
-		val = 7;
-		break;
-
-	default:
-		return -1;
-	}
-
-	*v |= val << 8;
-	return 0;
-}
-
-/**
- * s3c2410_calc_bank - calculate bank timing infromation
- * @cfg: The configuration we need to calculate for.
- * @bt: The bank timing information.
- *
- * Given the cycle timine for a bank @bt, calculate the new BANKCON
- * setting for the @cfg timing. This updates the timing information
- * ready for the cpu frequency change.
- */
-static int s3c2410_calc_bank(struct s3c_cpufreq_config *cfg,
-			     struct s3c2410_iobank_timing *bt)
-{
-	unsigned long hclk = cfg->freq.hclk_tns;
-	unsigned long res;
-	int ret;
-
-	res  = bt->bankcon;
-	res &= (S3C2410_BANKCON_SDRAM | S3C2410_BANKCON_PMC16);
-
-	/* tacp: 2,3,4,5 */
-	/* tcah: 0,1,2,4 */
-	/* tcoh: 0,1,2,4 */
-	/* tacc: 1,2,3,4,6,7,10,14 (>4 for nwait) */
-	/* tcos: 0,1,2,4 */
-	/* tacs: 0,1,2,4 */
-
-	ret  = calc_0124(bt->tacs, hclk, &res, S3C2410_BANKCON_Tacs_SHIFT);
-	ret |= calc_0124(bt->tcos, hclk, &res, S3C2410_BANKCON_Tcos_SHIFT);
-	ret |= calc_0124(bt->tcah, hclk, &res, S3C2410_BANKCON_Tcah_SHIFT);
-	ret |= calc_0124(bt->tcoh, hclk, &res, S3C2410_BANKCON_Tcoh_SHIFT);
-
-	if (ret)
-		return -EINVAL;
-
-	ret |= calc_tacp(bt->tacp, hclk, &res);
-	ret |= calc_tacc(bt->tacc, bt->nwait_en, hclk, &res);
-
-	if (ret)
-		return -EINVAL;
-
-	bt->bankcon = res;
-	return 0;
-}
-
-static unsigned int tacc_tab[] = {
-	[0]	= 1,
-	[1]	= 2,
-	[2]	= 3,
-	[3]	= 4,
-	[4]	= 6,
-	[5]	= 9,
-	[6]	= 10,
-	[7]	= 14,
-};
-
-/**
- * get_tacc - turn tACC value into cycle time
- * @hclk_tns: The cycle time for HCLK, in 10ths of nanoseconds.
- * @val: The bank timing register value, shifed down.
- */
-static unsigned int get_tacc(unsigned long hclk_tns,
-			     unsigned long val)
-{
-	val &= 7;
-	return hclk_tns * tacc_tab[val];
-}
-
-/**
- * get_0124 - turn 0/1/2/4 divider into cycle time
- * @hclk_tns: The cycle time for HCLK, in 10ths of nanoseconds.
- * @val: The bank timing register value, shifed down.
- */
-static unsigned int get_0124(unsigned long hclk_tns,
-			     unsigned long val)
-{
-	val &= 3;
-	return hclk_tns * ((val == 3) ? 4 : val);
-}
-
-/**
- * s3c2410_iotiming_getbank - turn BANKCON into cycle time information
- * @cfg: The frequency configuration
- * @bt: The bank timing to fill in (uses cached BANKCON)
- *
- * Given the BANKCON setting in @bt and the current frequency settings
- * in @cfg, update the cycle timing information.
- */
-void s3c2410_iotiming_getbank(struct s3c_cpufreq_config *cfg,
-			      struct s3c2410_iobank_timing *bt)
-{
-	unsigned long bankcon = bt->bankcon;
-	unsigned long hclk = cfg->freq.hclk_tns;
-
-	bt->tcah = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcah_SHIFT);
-	bt->tcoh = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcoh_SHIFT);
-	bt->tcos = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcos_SHIFT);
-	bt->tacs = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tacs_SHIFT);
-	bt->tacc = get_tacc(hclk, bankcon >> S3C2410_BANKCON_Tacc_SHIFT);
-}
-
-/**
- * s3c2410_iotiming_debugfs - debugfs show io bank timing information
- * @seq: The seq_file to write output to using seq_printf().
- * @cfg: The current configuration.
- * @iob: The IO bank information to decode.
- */
-void s3c2410_iotiming_debugfs(struct seq_file *seq,
-			      struct s3c_cpufreq_config *cfg,
-			      union s3c_iobank *iob)
-{
-	struct s3c2410_iobank_timing *bt = iob->io_2410;
-	unsigned long bankcon = bt->bankcon;
-	unsigned long hclk = cfg->freq.hclk_tns;
-	unsigned int tacs;
-	unsigned int tcos;
-	unsigned int tacc;
-	unsigned int tcoh;
-	unsigned int tcah;
-
-	seq_printf(seq, "BANKCON=0x%08lx\n", bankcon);
-
-	tcah = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcah_SHIFT);
-	tcoh = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcoh_SHIFT);
-	tcos = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tcos_SHIFT);
-	tacs = get_0124(hclk, bankcon >> S3C2410_BANKCON_Tacs_SHIFT);
-	tacc = get_tacc(hclk, bankcon >> S3C2410_BANKCON_Tacc_SHIFT);
-
-	seq_printf(seq,
-		   "\tRead: Tacs=%d.%d, Tcos=%d.%d, Tacc=%d.%d, Tcoh=%d.%d, Tcah=%d.%d\n",
-		   print_ns(bt->tacs),
-		   print_ns(bt->tcos),
-		   print_ns(bt->tacc),
-		   print_ns(bt->tcoh),
-		   print_ns(bt->tcah));
-
-	seq_printf(seq,
-		   "\t Set: Tacs=%d.%d, Tcos=%d.%d, Tacc=%d.%d, Tcoh=%d.%d, Tcah=%d.%d\n",
-		   print_ns(tacs),
-		   print_ns(tcos),
-		   print_ns(tacc),
-		   print_ns(tcoh),
-		   print_ns(tcah));
-}
-
-/**
- * s3c2410_iotiming_calc - Calculate bank timing for frequency change.
- * @cfg: The frequency configuration
- * @iot: The IO timing information to fill out.
- *
- * Calculate the new values for the banks in @iot based on the new
- * frequency information in @cfg. This is then used by s3c2410_iotiming_set()
- * to update the timing when necessary.
- */
-int s3c2410_iotiming_calc(struct s3c_cpufreq_config *cfg,
-			  struct s3c_iotimings *iot)
-{
-	struct s3c2410_iobank_timing *bt;
-	unsigned long bankcon;
-	int bank;
-	int ret;
-
-	for (bank = 0; bank < MAX_BANKS; bank++) {
-		bankcon = __raw_readl(bank_reg(bank));
-		bt = iot->bank[bank].io_2410;
-
-		if (!bt)
-			continue;
-
-		bt->bankcon = bankcon;
-
-		ret = s3c2410_calc_bank(cfg, bt);
-		if (ret) {
-			printk(KERN_ERR "%s: cannot calculate bank %d io\n",
-			       __func__, bank);
-			goto err;
-		}
-
-		s3c_freq_iodbg("%s: bank %d: con=%08lx\n",
-			       __func__, bank, bt->bankcon);
-	}
-
-	return 0;
- err:
-	return ret;
-}
-
-/**
- * s3c2410_iotiming_set - set the IO timings from the given setup.
- * @cfg: The frequency configuration
- * @iot: The IO timing information to use.
- *
- * Set all the currently used IO bank timing information generated
- * by s3c2410_iotiming_calc() once the core has validated that all
- * the new values are within permitted bounds.
- */
-void s3c2410_iotiming_set(struct s3c_cpufreq_config *cfg,
-			  struct s3c_iotimings *iot)
-{
-	struct s3c2410_iobank_timing *bt;
-	int bank;
-
-	/* set the io timings from the specifier */
-
-	for (bank = 0; bank < MAX_BANKS; bank++) {
-		bt = iot->bank[bank].io_2410;
-		if (!bt)
-			continue;
-
-		__raw_writel(bt->bankcon, bank_reg(bank));
-	}
-}
-
-/**
- * s3c2410_iotiming_get - Get the timing information from current registers.
- * @cfg: The frequency configuration
- * @timings: The IO timing information to fill out.
- *
- * Calculate the @timings timing information from the current frequency
- * information in @cfg, and the new frequency configur
- * through all the IO banks, reading the state and then updating @iot
- * as necessary.
- *
- * This is used at the moment on initialisation to get the current
- * configuration so that boards do not have to carry their own setup
- * if the timings are correct on initialisation.
- */
-
-int s3c2410_iotiming_get(struct s3c_cpufreq_config *cfg,
-			 struct s3c_iotimings *timings)
-{
-	struct s3c2410_iobank_timing *bt;
-	unsigned long bankcon;
-	unsigned long bwscon;
-	int bank;
-
-	bwscon = __raw_readl(S3C2410_BWSCON);
-
-	/* look through all banks to see what is currently set. */
-
-	for (bank = 0; bank < MAX_BANKS; bank++) {
-		bankcon = __raw_readl(bank_reg(bank));
-
-		if (!bank_is_io(bankcon))
-			continue;
-
-		s3c_freq_iodbg("%s: bank %d: con %08lx\n",
-			       __func__, bank, bankcon);
-
-		bt = kzalloc(sizeof(struct s3c2410_iobank_timing), GFP_KERNEL);
-		if (!bt) {
-			printk(KERN_ERR "%s: no memory for bank\n", __func__);
-			return -ENOMEM;
-		}
-
-		/* find out in nWait is enabled for bank. */
-
-		if (bank != 0) {
-			unsigned long tmp  = S3C2410_BWSCON_GET(bwscon, bank);
-			if (tmp & S3C2410_BWSCON_WS)
-				bt->nwait_en = 1;
-		}
-
-		timings->bank[bank].io_2410 = bt;
-		bt->bankcon = bankcon;
-
-		s3c2410_iotiming_getbank(cfg, bt);
-	}
-
-	s3c2410_print_timing("get", timings);
-	return 0;
-}