A lot of files rely on include/driver.h including include/of.h (and this including include/errno.h. include the files explicitly so we can eventually get rid of including of.h from driver.h Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
478 lines
11 KiB
C
478 lines
11 KiB
C
/*
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* esdctl.c - i.MX sdram controller functions
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*
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* Copyright (c) 2012 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <common.h>
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#include <io.h>
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#include <errno.h>
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#include <sizes.h>
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#include <init.h>
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#include <asm/barebox-arm.h>
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#include <asm/memory.h>
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#include <mach/esdctl.h>
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#include <mach/esdctl-v4.h>
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#include <mach/imx1-regs.h>
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#include <mach/imx21-regs.h>
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#include <mach/imx25-regs.h>
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#include <mach/imx27-regs.h>
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#include <mach/imx31-regs.h>
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#include <mach/imx35-regs.h>
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#include <mach/imx51-regs.h>
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#include <mach/imx53-regs.h>
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struct imx_esdctl_data {
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unsigned long base0;
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unsigned long base1;
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void (*add_mem)(void *esdctlbase, struct imx_esdctl_data *);
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};
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static int imx_esdctl_disabled;
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/*
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* Boards can disable SDRAM detection if it doesn't work for them. In
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* this case arm_add_mem_device has to be called by board code.
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*/
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void imx_esdctl_disable(void)
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{
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imx_esdctl_disabled = 1;
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}
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/*
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* v1 - found on i.MX1
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*/
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static inline unsigned long imx_v1_sdram_size(void __iomem *esdctlbase, int num)
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{
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void __iomem *esdctl = esdctlbase + (num ? 4 : 0);
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u32 ctlval = readl(esdctl);
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unsigned long size;
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int rows, cols, width = 2, banks = 4;
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if (!(ctlval & ESDCTL0_SDE))
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/* SDRAM controller disabled, so no RAM here */
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return 0;
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rows = ((ctlval >> 24) & 0x3) + 11;
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cols = ((ctlval >> 20) & 0x3) + 8;
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if (ctlval & (1 << 17))
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width = 4;
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size = (1 << cols) * (1 << rows) * banks * width;
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if (size > SZ_64M)
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size = SZ_64M;
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return size;
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}
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/*
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* v2 - found on i.MX25, i.MX27, i.MX31 and i.MX35
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*/
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static inline unsigned long imx_v2_sdram_size(void __iomem *esdctlbase, int num)
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{
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void __iomem *esdctl = esdctlbase + (num ? IMX_ESDCTL1 : IMX_ESDCTL0);
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u32 ctlval = readl(esdctl);
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unsigned long size;
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int rows, cols, width = 2, banks = 4;
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if (!(ctlval & ESDCTL0_SDE))
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/* SDRAM controller disabled, so no RAM here */
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return 0;
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rows = ((ctlval >> 24) & 0x7) + 11;
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cols = ((ctlval >> 20) & 0x3) + 8;
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if ((ctlval & ESDCTL0_DSIZ_MASK) == ESDCTL0_DSIZ_31_0)
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width = 4;
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size = (1 << cols) * (1 << rows) * banks * width;
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if (size > SZ_256M)
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size = SZ_256M;
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return size;
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}
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/*
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* v3 - found on i.MX51
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*/
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static inline unsigned long imx_v3_sdram_size(void __iomem *esdctlbase, int num)
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{
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unsigned long size;
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size = imx_v2_sdram_size(esdctlbase, num);
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if (readl(esdctlbase + IMX_ESDMISC) & (1 << 6))
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size *= 2;
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if (size > SZ_256M)
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size = SZ_256M;
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return size;
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}
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/*
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* v4 - found on i.MX53
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*/
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static inline unsigned long imx_v4_sdram_size(void __iomem *esdctlbase, int cs)
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{
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u32 ctlval = readl(esdctlbase + ESDCTL_V4_ESDCTL0);
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u32 esdmisc = readl(esdctlbase + ESDCTL_V4_ESDMISC);
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unsigned long size;
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int rows, cols, width = 2, banks = 8;
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if (cs == 0 && !(ctlval & ESDCTL_V4_ESDCTLx_SDE0))
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return 0;
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if (cs == 1 && !(ctlval & ESDCTL_V4_ESDCTLx_SDE1))
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return 0;
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/* one 2GiB cs, memory is returned for cs0 only */
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if (cs == 1 && (esdmisc & ESDCTL_V4_ESDMISC_ONE_CS))
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return 0;
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rows = ((ctlval >> 24) & 0x7) + 11;
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cols = (ctlval >> 20) & 0x7;
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if (cols == 3)
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cols = 8;
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else if (cols == 4)
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cols = 12;
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else
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cols += 9;
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if (ctlval & ESDCTL_V4_ESDCTLx_DSIZ_32B)
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width = 4;
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if (esdmisc & ESDCTL_V4_ESDMISC_BANKS_4)
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banks = 4;
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size = (1 << cols) * (1 << rows) * banks * width;
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return size;
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}
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static void add_mem(unsigned long base0, unsigned long size0,
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unsigned long base1, unsigned long size1)
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{
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debug("%s: cs0 base: 0x%08lx cs0 size: 0x%08lx\n", __func__, base0, size0);
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debug("%s: cs1 base: 0x%08lx cs1 size: 0x%08lx\n", __func__, base1, size1);
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if (base0 + size0 == base1 && size1 > 0) {
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/*
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* concatenate both chip selects to a single bank
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*/
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arm_add_mem_device("ram0", base0, size0 + size1);
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return;
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}
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if (size0)
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arm_add_mem_device("ram0", base0, size0);
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if (size1)
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arm_add_mem_device(size0 ? "ram1" : "ram0", base1, size1);
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}
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/*
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* On i.MX27, i.MX31 and i.MX35 the second chipselect is enabled by reset default.
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* This setting makes it impossible to detect the correct SDRAM size on
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* these SoCs. We disable the chipselect if this reset default setting is
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* found. This of course leads to incorrect SDRAM detection on boards which
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* really have this reset default as a valid setting. If you have such a
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* board drop a mail to search for a solution.
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*/
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#define ESDCTL1_RESET_DEFAULT 0x81120080
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static inline void imx_esdctl_v2_disable_default(void *esdctlbase)
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{
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u32 ctlval = readl(esdctlbase + IMX_ESDCTL1);
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if (ctlval == ESDCTL1_RESET_DEFAULT) {
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ctlval &= ~(1 << 31);
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writel(ctlval, esdctlbase + IMX_ESDCTL1);
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}
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}
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static void imx_esdctl_v1_add_mem(void *esdctlbase, struct imx_esdctl_data *data)
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{
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add_mem(data->base0, imx_v1_sdram_size(esdctlbase, 0),
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data->base1, imx_v1_sdram_size(esdctlbase, 1));
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}
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static void imx_esdctl_v2_add_mem(void *esdctlbase, struct imx_esdctl_data *data)
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{
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add_mem(data->base0, imx_v2_sdram_size(esdctlbase, 0),
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data->base1, imx_v2_sdram_size(esdctlbase, 1));
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}
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static void imx_esdctl_v2_bug_add_mem(void *esdctlbase, struct imx_esdctl_data *data)
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{
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imx_esdctl_v2_disable_default(esdctlbase);
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add_mem(data->base0, imx_v2_sdram_size(esdctlbase, 0),
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data->base1, imx_v2_sdram_size(esdctlbase, 1));
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}
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static void imx_esdctl_v3_add_mem(void *esdctlbase, struct imx_esdctl_data *data)
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{
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add_mem(data->base0, imx_v3_sdram_size(esdctlbase, 0),
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data->base1, imx_v3_sdram_size(esdctlbase, 1));
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}
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static void imx_esdctl_v4_add_mem(void *esdctlbase, struct imx_esdctl_data *data)
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{
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add_mem(data->base0, imx_v4_sdram_size(esdctlbase, 0),
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data->base1, imx_v4_sdram_size(esdctlbase, 1));
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}
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static int imx_esdctl_probe(struct device_d *dev)
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{
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struct imx_esdctl_data *data;
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int ret;
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void *base;
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ret = dev_get_drvdata(dev, (unsigned long *)&data);
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if (ret)
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return ret;
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base = dev_request_mem_region(dev, 0);
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if (!base)
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return -ENOMEM;
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if (imx_esdctl_disabled)
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return 0;
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data->add_mem(base, data);
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return 0;
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}
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static __maybe_unused struct imx_esdctl_data imx1_data = {
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.base0 = MX1_CSD0_BASE_ADDR,
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.base1 = MX1_CSD1_BASE_ADDR,
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.add_mem = imx_esdctl_v1_add_mem,
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};
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static __maybe_unused struct imx_esdctl_data imx25_data = {
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.base0 = MX25_CSD0_BASE_ADDR,
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.base1 = MX25_CSD1_BASE_ADDR,
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.add_mem = imx_esdctl_v2_add_mem,
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};
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static __maybe_unused struct imx_esdctl_data imx27_data = {
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.base0 = MX27_CSD0_BASE_ADDR,
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.base1 = MX27_CSD1_BASE_ADDR,
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.add_mem = imx_esdctl_v2_bug_add_mem,
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};
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static __maybe_unused struct imx_esdctl_data imx31_data = {
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.base0 = MX31_CSD0_BASE_ADDR,
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.base1 = MX31_CSD1_BASE_ADDR,
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.add_mem = imx_esdctl_v2_bug_add_mem,
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};
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static __maybe_unused struct imx_esdctl_data imx35_data = {
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.base0 = MX35_CSD0_BASE_ADDR,
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.base1 = MX35_CSD1_BASE_ADDR,
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.add_mem = imx_esdctl_v2_bug_add_mem,
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};
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static __maybe_unused struct imx_esdctl_data imx51_data = {
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.base0 = MX51_CSD0_BASE_ADDR,
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.base1 = MX51_CSD1_BASE_ADDR,
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.add_mem = imx_esdctl_v3_add_mem,
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};
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static __maybe_unused struct imx_esdctl_data imx53_data = {
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.base0 = MX53_CSD0_BASE_ADDR,
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.base1 = MX53_CSD1_BASE_ADDR,
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.add_mem = imx_esdctl_v4_add_mem,
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};
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static struct platform_device_id imx_esdctl_ids[] = {
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#ifdef CONFIG_ARCH_IMX1
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{
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.name = "imx1-sdramc",
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.driver_data = (unsigned long)&imx1_data,
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},
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#endif
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#ifdef CONFIG_ARCH_IMX25
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{
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.name = "imx25-esdctl",
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.driver_data = (unsigned long)&imx25_data,
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},
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#endif
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#ifdef CONFIG_ARCH_IMX27
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{
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.name = "imx27-esdctl",
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.driver_data = (unsigned long)&imx27_data,
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},
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#endif
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#ifdef CONFIG_ARCH_IMX31
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{
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.name = "imx31-esdctl",
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.driver_data = (unsigned long)&imx31_data,
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},
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#endif
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#ifdef CONFIG_ARCH_IMX35
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{
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.name = "imx35-esdctl",
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.driver_data = (unsigned long)&imx35_data,
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},
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#endif
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#ifdef CONFIG_ARCH_IMX51
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{
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.name = "imx51-esdctl",
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.driver_data = (unsigned long)&imx51_data,
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},
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#endif
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#ifdef CONFIG_ARCH_IMX53
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{
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.name = "imx53-esdctl",
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.driver_data = (unsigned long)&imx53_data,
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},
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#endif
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{
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/* sentinel */
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},
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};
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static struct driver_d imx_serial_driver = {
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.name = "imx-esdctl",
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.probe = imx_esdctl_probe,
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.id_table = imx_esdctl_ids,
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};
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static int imx_esdctl_init(void)
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{
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return platform_driver_register(&imx_serial_driver);
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}
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mem_initcall(imx_esdctl_init);
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/*
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* The i.MX SoCs usually have two SDRAM chipselects. The following
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* SoC specific functions return:
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*
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* - cs0 disabled, cs1 disabled: 0
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* - cs0 enabled, cs1 disabled: SDRAM size for cs0
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* - cs0 disabled, c1 enabled: 0 (currently assumed that no hardware does this)
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* - cs0 enabled, cs1 enabled: The largest continuous region, that is, cs0 + cs1
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* if cs0 is taking the whole address space.
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*/
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void __naked __noreturn imx1_barebox_entry(uint32_t boarddata)
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{
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unsigned long base;
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unsigned long size;
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base = MX1_CSD0_BASE_ADDR;
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size = imx_v1_sdram_size((void *)MX1_SDRAMC_BASE_ADDR, 0);
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if (size == SZ_64M)
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size += imx_v1_sdram_size((void *)MX1_SDRAMC_BASE_ADDR, 1);
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barebox_arm_entry(base, size, boarddata);
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}
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void __naked __noreturn imx25_barebox_entry(uint32_t boarddata)
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{
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unsigned long base;
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unsigned long size;
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base = MX25_CSD0_BASE_ADDR;
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size = imx_v2_sdram_size((void *)MX25_ESDCTL_BASE_ADDR, 0);
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if (size == SZ_256M)
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size += imx_v2_sdram_size((void *)MX25_ESDCTL_BASE_ADDR, 1);
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barebox_arm_entry(base, size, boarddata);
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}
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void __naked __noreturn imx27_barebox_entry(uint32_t boarddata)
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{
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unsigned long base;
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unsigned long size;
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imx_esdctl_v2_disable_default((void *)MX27_ESDCTL_BASE_ADDR);
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base = MX27_CSD0_BASE_ADDR;
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size = imx_v2_sdram_size((void *)MX27_ESDCTL_BASE_ADDR, 0);
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if (size == SZ_256M)
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size += imx_v2_sdram_size((void *)MX27_ESDCTL_BASE_ADDR, 1);
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barebox_arm_entry(base, size, boarddata);
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}
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void __naked __noreturn imx31_barebox_entry(uint32_t boarddata)
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{
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unsigned long base;
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unsigned long size;
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imx_esdctl_v2_disable_default((void *)MX31_ESDCTL_BASE_ADDR);
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base = MX31_CSD0_BASE_ADDR;
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size = imx_v2_sdram_size((void *)MX31_ESDCTL_BASE_ADDR, 0);
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if (size == SZ_256M)
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size += imx_v2_sdram_size((void *)MX31_ESDCTL_BASE_ADDR, 1);
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barebox_arm_entry(base, size, boarddata);
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}
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void __naked __noreturn imx35_barebox_entry(uint32_t boarddata)
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{
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unsigned long base;
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unsigned long size;
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imx_esdctl_v2_disable_default((void *)MX35_ESDCTL_BASE_ADDR);
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base = MX35_CSD0_BASE_ADDR;
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size = imx_v2_sdram_size((void *)MX35_ESDCTL_BASE_ADDR, 0);
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if (size == SZ_256M)
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size += imx_v2_sdram_size((void *)MX35_ESDCTL_BASE_ADDR, 1);
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barebox_arm_entry(base, size, boarddata);
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}
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void __naked __noreturn imx51_barebox_entry(uint32_t boarddata)
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{
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unsigned long base;
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unsigned long size;
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base = MX51_CSD0_BASE_ADDR;
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size = imx_v3_sdram_size((void *)MX51_ESDCTL_BASE_ADDR, 0);
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if (size == SZ_256M)
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size += imx_v3_sdram_size((void *)MX51_ESDCTL_BASE_ADDR, 1);
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barebox_arm_entry(base, size, boarddata);
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}
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void __naked __noreturn imx53_barebox_entry(uint32_t boarddata)
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{
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unsigned long base;
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unsigned long size;
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base = MX53_CSD0_BASE_ADDR;
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size = imx_v4_sdram_size((void *)MX53_ESDCTL_BASE_ADDR, 0);
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if (size == SZ_1G)
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size += imx_v4_sdram_size((void *)MX53_ESDCTL_BASE_ADDR, 1);
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barebox_arm_entry(base, size, boarddata);
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}
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