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Diffstat (limited to 'drivers/pcmcia/pxa2xx_base.c')
-rw-r--r--drivers/pcmcia/pxa2xx_base.c370
1 files changed, 370 insertions, 0 deletions
diff --git a/drivers/pcmcia/pxa2xx_base.c b/drivers/pcmcia/pxa2xx_base.c
new file mode 100644
index 000000000..0ea41f141
--- /dev/null
+++ b/drivers/pcmcia/pxa2xx_base.c
@@ -0,0 +1,370 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*======================================================================
+
+ Device driver for the PCMCIA control functionality of PXA2xx
+ microprocessors.
+
+
+ (c) Ian Molton (spyro@f2s.com) 2003
+ (c) Stefan Eletzhofer (stefan.eletzhofer@inquant.de) 2003,4
+
+ derived from sa11xx_base.c
+
+ Portions created by John G. Dorsey are
+ Copyright (C) 1999 John G. Dorsey.
+
+ ======================================================================*/
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/cpufreq.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/soc/pxa/cpu.h>
+#include <linux/soc/pxa/smemc.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+
+#include <pcmcia/ss.h>
+#include <pcmcia/cistpl.h>
+
+#include "soc_common.h"
+#include "pxa2xx_base.h"
+
+/*
+ * Personal Computer Memory Card International Association (PCMCIA) sockets
+ */
+
+#define PCMCIAPrtSp 0x04000000 /* PCMCIA Partition Space [byte] */
+#define PCMCIASp (4*PCMCIAPrtSp) /* PCMCIA Space [byte] */
+#define PCMCIAIOSp PCMCIAPrtSp /* PCMCIA I/O Space [byte] */
+#define PCMCIAAttrSp PCMCIAPrtSp /* PCMCIA Attribute Space [byte] */
+#define PCMCIAMemSp PCMCIAPrtSp /* PCMCIA Memory Space [byte] */
+
+#define PCMCIA0Sp PCMCIASp /* PCMCIA 0 Space [byte] */
+#define PCMCIA0IOSp PCMCIAIOSp /* PCMCIA 0 I/O Space [byte] */
+#define PCMCIA0AttrSp PCMCIAAttrSp /* PCMCIA 0 Attribute Space [byte] */
+#define PCMCIA0MemSp PCMCIAMemSp /* PCMCIA 0 Memory Space [byte] */
+
+#define PCMCIA1Sp PCMCIASp /* PCMCIA 1 Space [byte] */
+#define PCMCIA1IOSp PCMCIAIOSp /* PCMCIA 1 I/O Space [byte] */
+#define PCMCIA1AttrSp PCMCIAAttrSp /* PCMCIA 1 Attribute Space [byte] */
+#define PCMCIA1MemSp PCMCIAMemSp /* PCMCIA 1 Memory Space [byte] */
+
+#define _PCMCIA(Nb) /* PCMCIA [0..1] */ \
+ (0x20000000 + (Nb) * PCMCIASp)
+#define _PCMCIAIO(Nb) _PCMCIA(Nb) /* PCMCIA I/O [0..1] */
+#define _PCMCIAAttr(Nb) /* PCMCIA Attribute [0..1] */ \
+ (_PCMCIA(Nb) + 2 * PCMCIAPrtSp)
+#define _PCMCIAMem(Nb) /* PCMCIA Memory [0..1] */ \
+ (_PCMCIA(Nb) + 3 * PCMCIAPrtSp)
+
+#define _PCMCIA0 _PCMCIA(0) /* PCMCIA 0 */
+#define _PCMCIA0IO _PCMCIAIO(0) /* PCMCIA 0 I/O */
+#define _PCMCIA0Attr _PCMCIAAttr(0) /* PCMCIA 0 Attribute */
+#define _PCMCIA0Mem _PCMCIAMem(0) /* PCMCIA 0 Memory */
+
+#define _PCMCIA1 _PCMCIA(1) /* PCMCIA 1 */
+#define _PCMCIA1IO _PCMCIAIO(1) /* PCMCIA 1 I/O */
+#define _PCMCIA1Attr _PCMCIAAttr(1) /* PCMCIA 1 Attribute */
+#define _PCMCIA1Mem _PCMCIAMem(1) /* PCMCIA 1 Memory */
+
+
+#define MCXX_SETUP_MASK (0x7f)
+#define MCXX_ASST_MASK (0x1f)
+#define MCXX_HOLD_MASK (0x3f)
+#define MCXX_SETUP_SHIFT (0)
+#define MCXX_ASST_SHIFT (7)
+#define MCXX_HOLD_SHIFT (14)
+
+static inline u_int pxa2xx_mcxx_hold(u_int pcmcia_cycle_ns,
+ u_int mem_clk_10khz)
+{
+ u_int code = pcmcia_cycle_ns * mem_clk_10khz;
+ return (code / 300000) + ((code % 300000) ? 1 : 0) - 1;
+}
+
+static inline u_int pxa2xx_mcxx_asst(u_int pcmcia_cycle_ns,
+ u_int mem_clk_10khz)
+{
+ u_int code = pcmcia_cycle_ns * mem_clk_10khz;
+ return (code / 300000) + ((code % 300000) ? 1 : 0) + 1;
+}
+
+static inline u_int pxa2xx_mcxx_setup(u_int pcmcia_cycle_ns,
+ u_int mem_clk_10khz)
+{
+ u_int code = pcmcia_cycle_ns * mem_clk_10khz;
+ return (code / 100000) + ((code % 100000) ? 1 : 0) - 1;
+}
+
+/* This function returns the (approximate) command assertion period, in
+ * nanoseconds, for a given CPU clock frequency and MCXX_ASST value:
+ */
+static inline u_int pxa2xx_pcmcia_cmd_time(u_int mem_clk_10khz,
+ u_int pcmcia_mcxx_asst)
+{
+ return (300000 * (pcmcia_mcxx_asst + 1) / mem_clk_10khz);
+}
+
+static uint32_t pxa2xx_pcmcia_mcmem(int sock, int speed, int clock)
+{
+ uint32_t val;
+
+ val = ((pxa2xx_mcxx_setup(speed, clock)
+ & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
+ | ((pxa2xx_mcxx_asst(speed, clock)
+ & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
+ | ((pxa2xx_mcxx_hold(speed, clock)
+ & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
+
+ return val;
+}
+
+static int pxa2xx_pcmcia_mcio(int sock, int speed, int clock)
+{
+ uint32_t val;
+
+ val = ((pxa2xx_mcxx_setup(speed, clock)
+ & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
+ | ((pxa2xx_mcxx_asst(speed, clock)
+ & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
+ | ((pxa2xx_mcxx_hold(speed, clock)
+ & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
+
+
+ return val;
+}
+
+static int pxa2xx_pcmcia_mcatt(int sock, int speed, int clock)
+{
+ uint32_t val;
+
+ val = ((pxa2xx_mcxx_setup(speed, clock)
+ & MCXX_SETUP_MASK) << MCXX_SETUP_SHIFT)
+ | ((pxa2xx_mcxx_asst(speed, clock)
+ & MCXX_ASST_MASK) << MCXX_ASST_SHIFT)
+ | ((pxa2xx_mcxx_hold(speed, clock)
+ & MCXX_HOLD_MASK) << MCXX_HOLD_SHIFT);
+
+
+ return val;
+}
+
+static int pxa2xx_pcmcia_set_timing(struct soc_pcmcia_socket *skt)
+{
+ unsigned long clk = clk_get_rate(skt->clk) / 10000;
+ struct soc_pcmcia_timing timing;
+ int sock = skt->nr;
+
+ soc_common_pcmcia_get_timing(skt, &timing);
+
+ pxa_smemc_set_pcmcia_timing(sock,
+ pxa2xx_pcmcia_mcmem(sock, timing.mem, clk),
+ pxa2xx_pcmcia_mcatt(sock, timing.attr, clk),
+ pxa2xx_pcmcia_mcio(sock, timing.io, clk));
+
+ return 0;
+}
+
+#ifdef CONFIG_CPU_FREQ
+
+static int
+pxa2xx_pcmcia_frequency_change(struct soc_pcmcia_socket *skt,
+ unsigned long val,
+ struct cpufreq_freqs *freqs)
+{
+ switch (val) {
+ case CPUFREQ_PRECHANGE:
+ if (freqs->new > freqs->old) {
+ debug(skt, 2, "new frequency %u.%uMHz > %u.%uMHz, "
+ "pre-updating\n",
+ freqs->new / 1000, (freqs->new / 100) % 10,
+ freqs->old / 1000, (freqs->old / 100) % 10);
+ pxa2xx_pcmcia_set_timing(skt);
+ }
+ break;
+
+ case CPUFREQ_POSTCHANGE:
+ if (freqs->new < freqs->old) {
+ debug(skt, 2, "new frequency %u.%uMHz < %u.%uMHz, "
+ "post-updating\n",
+ freqs->new / 1000, (freqs->new / 100) % 10,
+ freqs->old / 1000, (freqs->old / 100) % 10);
+ pxa2xx_pcmcia_set_timing(skt);
+ }
+ break;
+ }
+ return 0;
+}
+#endif
+
+void pxa2xx_configure_sockets(struct device *dev, struct pcmcia_low_level *ops)
+{
+ int nr = 1;
+
+ if ((ops->first + ops->nr) > 1 ||
+ machine_is_viper() || machine_is_arcom_zeus())
+ nr = 2;
+
+ pxa_smemc_set_pcmcia_socket(nr);
+}
+EXPORT_SYMBOL(pxa2xx_configure_sockets);
+
+static const char *skt_names[] = {
+ "PCMCIA socket 0",
+ "PCMCIA socket 1",
+};
+
+#define SKT_DEV_INFO_SIZE(n) \
+ (sizeof(struct skt_dev_info) + (n)*sizeof(struct soc_pcmcia_socket))
+
+int pxa2xx_drv_pcmcia_add_one(struct soc_pcmcia_socket *skt)
+{
+ skt->res_skt.start = _PCMCIA(skt->nr);
+ skt->res_skt.end = _PCMCIA(skt->nr) + PCMCIASp - 1;
+ skt->res_skt.name = skt_names[skt->nr];
+ skt->res_skt.flags = IORESOURCE_MEM;
+
+ skt->res_io.start = _PCMCIAIO(skt->nr);
+ skt->res_io.end = _PCMCIAIO(skt->nr) + PCMCIAIOSp - 1;
+ skt->res_io.name = "io";
+ skt->res_io.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+
+ skt->res_mem.start = _PCMCIAMem(skt->nr);
+ skt->res_mem.end = _PCMCIAMem(skt->nr) + PCMCIAMemSp - 1;
+ skt->res_mem.name = "memory";
+ skt->res_mem.flags = IORESOURCE_MEM;
+
+ skt->res_attr.start = _PCMCIAAttr(skt->nr);
+ skt->res_attr.end = _PCMCIAAttr(skt->nr) + PCMCIAAttrSp - 1;
+ skt->res_attr.name = "attribute";
+ skt->res_attr.flags = IORESOURCE_MEM;
+
+ return soc_pcmcia_add_one(skt);
+}
+EXPORT_SYMBOL(pxa2xx_drv_pcmcia_add_one);
+
+void pxa2xx_drv_pcmcia_ops(struct pcmcia_low_level *ops)
+{
+ /* Provide our PXA2xx specific timing routines. */
+ ops->set_timing = pxa2xx_pcmcia_set_timing;
+#ifdef CONFIG_CPU_FREQ
+ ops->frequency_change = pxa2xx_pcmcia_frequency_change;
+#endif
+}
+EXPORT_SYMBOL(pxa2xx_drv_pcmcia_ops);
+
+static int pxa2xx_drv_pcmcia_probe(struct platform_device *dev)
+{
+ int i, ret = 0;
+ struct pcmcia_low_level *ops;
+ struct skt_dev_info *sinfo;
+ struct soc_pcmcia_socket *skt;
+ struct clk *clk;
+
+ ops = (struct pcmcia_low_level *)dev->dev.platform_data;
+ if (!ops) {
+ ret = -ENODEV;
+ goto err0;
+ }
+
+ if (cpu_is_pxa320() && ops->nr > 1) {
+ dev_err(&dev->dev, "pxa320 supports only one pcmcia slot");
+ ret = -EINVAL;
+ goto err0;
+ }
+
+ clk = devm_clk_get(&dev->dev, NULL);
+ if (IS_ERR(clk))
+ return -ENODEV;
+
+ pxa2xx_drv_pcmcia_ops(ops);
+
+ sinfo = devm_kzalloc(&dev->dev, SKT_DEV_INFO_SIZE(ops->nr),
+ GFP_KERNEL);
+ if (!sinfo)
+ return -ENOMEM;
+
+ sinfo->nskt = ops->nr;
+
+ /* Initialize processor specific parameters */
+ for (i = 0; i < ops->nr; i++) {
+ skt = &sinfo->skt[i];
+
+ skt->nr = ops->first + i;
+ skt->clk = clk;
+ soc_pcmcia_init_one(skt, ops, &dev->dev);
+
+ ret = pxa2xx_drv_pcmcia_add_one(skt);
+ if (ret)
+ goto err1;
+ }
+
+ pxa2xx_configure_sockets(&dev->dev, ops);
+ dev_set_drvdata(&dev->dev, sinfo);
+
+ return 0;
+
+err1:
+ while (--i >= 0)
+ soc_pcmcia_remove_one(&sinfo->skt[i]);
+
+err0:
+ return ret;
+}
+
+static int pxa2xx_drv_pcmcia_remove(struct platform_device *dev)
+{
+ struct skt_dev_info *sinfo = platform_get_drvdata(dev);
+ int i;
+
+ for (i = 0; i < sinfo->nskt; i++)
+ soc_pcmcia_remove_one(&sinfo->skt[i]);
+
+ return 0;
+}
+
+static int pxa2xx_drv_pcmcia_resume(struct device *dev)
+{
+ struct pcmcia_low_level *ops = (struct pcmcia_low_level *)dev->platform_data;
+
+ pxa2xx_configure_sockets(dev, ops);
+ return 0;
+}
+
+static const struct dev_pm_ops pxa2xx_drv_pcmcia_pm_ops = {
+ .resume = pxa2xx_drv_pcmcia_resume,
+};
+
+static struct platform_driver pxa2xx_pcmcia_driver = {
+ .probe = pxa2xx_drv_pcmcia_probe,
+ .remove = pxa2xx_drv_pcmcia_remove,
+ .driver = {
+ .name = "pxa2xx-pcmcia",
+ .pm = &pxa2xx_drv_pcmcia_pm_ops,
+ },
+};
+
+static int __init pxa2xx_pcmcia_init(void)
+{
+ return platform_driver_register(&pxa2xx_pcmcia_driver);
+}
+
+static void __exit pxa2xx_pcmcia_exit(void)
+{
+ platform_driver_unregister(&pxa2xx_pcmcia_driver);
+}
+
+fs_initcall(pxa2xx_pcmcia_init);
+module_exit(pxa2xx_pcmcia_exit);
+
+MODULE_AUTHOR("Stefan Eletzhofer <stefan.eletzhofer@inquant.de> and Ian Molton <spyro@f2s.com>");
+MODULE_DESCRIPTION("Linux PCMCIA Card Services: PXA2xx core socket driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pxa2xx-pcmcia");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 06:57:48 +0000