mtd: maps: Rename physmap_of_{versatile, gemini} into physmap-{versatile, gemini}
Now that the physmap_of driver is gone, the gemini and versative extensions are part of the physmap driver. Rename the source files and the config option to reflect this. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Reviewed-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Acked-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Boris Brezillon
254
drivers/mtd/maps/physmap-versatile.c
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254
drivers/mtd/maps/physmap-versatile.c
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/*
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* Versatile OF physmap driver add-on
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*
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* Copyright (c) 2016, Linaro Limited
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* Author: Linus Walleij <linus.walleij@linaro.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <linux/export.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_address.h>
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#include <linux/of_device.h>
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#include <linux/mtd/map.h>
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#include <linux/mfd/syscon.h>
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#include <linux/regmap.h>
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#include <linux/bitops.h>
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#include "physmap-versatile.h"
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static struct regmap *syscon_regmap;
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enum versatile_flashprot {
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INTEGRATOR_AP_FLASHPROT,
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INTEGRATOR_CP_FLASHPROT,
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VERSATILE_FLASHPROT,
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REALVIEW_FLASHPROT,
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};
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static const struct of_device_id syscon_match[] = {
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{
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.compatible = "arm,integrator-ap-syscon",
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.data = (void *)INTEGRATOR_AP_FLASHPROT,
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},
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{
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.compatible = "arm,integrator-cp-syscon",
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.data = (void *)INTEGRATOR_CP_FLASHPROT,
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},
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{
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.compatible = "arm,core-module-versatile",
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.data = (void *)VERSATILE_FLASHPROT,
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},
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{
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.compatible = "arm,realview-eb-syscon",
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.data = (void *)REALVIEW_FLASHPROT,
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},
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{
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.compatible = "arm,realview-pb1176-syscon",
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.data = (void *)REALVIEW_FLASHPROT,
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},
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{
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.compatible = "arm,realview-pb11mp-syscon",
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.data = (void *)REALVIEW_FLASHPROT,
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},
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{
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.compatible = "arm,realview-pba8-syscon",
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.data = (void *)REALVIEW_FLASHPROT,
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},
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{
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.compatible = "arm,realview-pbx-syscon",
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.data = (void *)REALVIEW_FLASHPROT,
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},
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{},
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};
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/*
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* Flash protection handling for the Integrator/AP
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*/
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#define INTEGRATOR_SC_CTRLS_OFFSET 0x08
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#define INTEGRATOR_SC_CTRLC_OFFSET 0x0C
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#define INTEGRATOR_SC_CTRL_FLVPPEN BIT(1)
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#define INTEGRATOR_SC_CTRL_FLWP BIT(2)
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#define INTEGRATOR_EBI_CSR1_OFFSET 0x04
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/* The manual says bit 2, the code says bit 3, trust the code */
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#define INTEGRATOR_EBI_WRITE_ENABLE BIT(3)
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#define INTEGRATOR_EBI_LOCK_OFFSET 0x20
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#define INTEGRATOR_EBI_LOCK_VAL 0xA05F
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static const struct of_device_id ebi_match[] = {
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{ .compatible = "arm,external-bus-interface"},
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{ },
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};
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static int ap_flash_init(struct platform_device *pdev)
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{
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struct device_node *ebi;
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void __iomem *ebi_base;
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u32 val;
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int ret;
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/* Look up the EBI */
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ebi = of_find_matching_node(NULL, ebi_match);
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if (!ebi) {
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return -ENODEV;
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}
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ebi_base = of_iomap(ebi, 0);
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if (!ebi_base)
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return -ENODEV;
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/* Clear VPP and write protection bits */
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ret = regmap_write(syscon_regmap,
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INTEGRATOR_SC_CTRLC_OFFSET,
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INTEGRATOR_SC_CTRL_FLVPPEN | INTEGRATOR_SC_CTRL_FLWP);
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if (ret)
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dev_err(&pdev->dev, "error clearing Integrator VPP/WP\n");
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/* Unlock the EBI */
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writel(INTEGRATOR_EBI_LOCK_VAL, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
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/* Enable write cycles on the EBI, CSR1 (flash) */
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val = readl(ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
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val |= INTEGRATOR_EBI_WRITE_ENABLE;
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writel(val, ebi_base + INTEGRATOR_EBI_CSR1_OFFSET);
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/* Lock the EBI again */
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writel(0, ebi_base + INTEGRATOR_EBI_LOCK_OFFSET);
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iounmap(ebi_base);
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return 0;
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}
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static void ap_flash_set_vpp(struct map_info *map, int on)
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{
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int ret;
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if (on) {
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ret = regmap_write(syscon_regmap,
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INTEGRATOR_SC_CTRLS_OFFSET,
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INTEGRATOR_SC_CTRL_FLVPPEN | INTEGRATOR_SC_CTRL_FLWP);
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if (ret)
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pr_err("error enabling AP VPP\n");
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} else {
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ret = regmap_write(syscon_regmap,
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INTEGRATOR_SC_CTRLC_OFFSET,
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INTEGRATOR_SC_CTRL_FLVPPEN | INTEGRATOR_SC_CTRL_FLWP);
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if (ret)
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pr_err("error disabling AP VPP\n");
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}
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}
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/*
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* Flash protection handling for the Integrator/CP
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*/
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#define INTCP_FLASHPROG_OFFSET 0x04
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#define CINTEGRATOR_FLVPPEN BIT(0)
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#define CINTEGRATOR_FLWREN BIT(1)
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#define CINTEGRATOR_FLMASK BIT(0)|BIT(1)
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static void cp_flash_set_vpp(struct map_info *map, int on)
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{
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int ret;
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if (on) {
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ret = regmap_update_bits(syscon_regmap,
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INTCP_FLASHPROG_OFFSET,
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CINTEGRATOR_FLMASK,
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CINTEGRATOR_FLVPPEN | CINTEGRATOR_FLWREN);
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if (ret)
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pr_err("error setting CP VPP\n");
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} else {
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ret = regmap_update_bits(syscon_regmap,
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INTCP_FLASHPROG_OFFSET,
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CINTEGRATOR_FLMASK,
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0);
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if (ret)
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pr_err("error setting CP VPP\n");
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}
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}
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/*
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* Flash protection handling for the Versatiles and RealViews
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*/
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#define VERSATILE_SYS_FLASH_OFFSET 0x4C
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static void versatile_flash_set_vpp(struct map_info *map, int on)
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{
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int ret;
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ret = regmap_update_bits(syscon_regmap, VERSATILE_SYS_FLASH_OFFSET,
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0x01, !!on);
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if (ret)
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pr_err("error setting Versatile VPP\n");
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}
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int of_flash_probe_versatile(struct platform_device *pdev,
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struct device_node *np,
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struct map_info *map)
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{
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struct device_node *sysnp;
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const struct of_device_id *devid;
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struct regmap *rmap;
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static enum versatile_flashprot versatile_flashprot;
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int ret;
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/* Not all flash chips use this protection line */
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if (!of_device_is_compatible(np, "arm,versatile-flash"))
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return 0;
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/* For first chip probed, look up the syscon regmap */
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if (!syscon_regmap) {
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sysnp = of_find_matching_node_and_match(NULL,
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syscon_match,
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&devid);
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if (!sysnp)
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return -ENODEV;
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versatile_flashprot = (enum versatile_flashprot)devid->data;
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rmap = syscon_node_to_regmap(sysnp);
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if (IS_ERR(rmap))
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return PTR_ERR(rmap);
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syscon_regmap = rmap;
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}
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switch (versatile_flashprot) {
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case INTEGRATOR_AP_FLASHPROT:
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ret = ap_flash_init(pdev);
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if (ret)
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return ret;
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map->set_vpp = ap_flash_set_vpp;
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dev_info(&pdev->dev, "Integrator/AP flash protection\n");
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break;
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case INTEGRATOR_CP_FLASHPROT:
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map->set_vpp = cp_flash_set_vpp;
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dev_info(&pdev->dev, "Integrator/CP flash protection\n");
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break;
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case VERSATILE_FLASHPROT:
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case REALVIEW_FLASHPROT:
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map->set_vpp = versatile_flash_set_vpp;
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dev_info(&pdev->dev, "versatile/realview flash protection\n");
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break;
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default:
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dev_info(&pdev->dev, "device marked as Versatile flash "
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"but no system controller was found\n");
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break;
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}
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return 0;
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}
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