[PATCH] MPC8xx PCMCIA driver
From: Marcelo Tosatti
Date: Mon Aug 29 2005 - 21:59:40 EST
Hi,
Here goes the 8xx PCMCIA driver, originally written by Magnus Damm, with
several improvements and fixes.
The driver was merged in v2.4 but never forward ported to v2.6.
Please review, comments are welcome (including aesthetic enhancements).
Russell: The driver is using pccard_nonstatic_ops for card window
management, even though the driver its marked SS_STATIC_MAP (using
mem->static_map).
Otherwise card IO windows aren't allocated properly.
diff --git a/drivers/pcmcia/Kconfig b/drivers/pcmcia/Kconfig
--- a/drivers/pcmcia/Kconfig
+++ b/drivers/pcmcia/Kconfig
@@ -154,6 +154,16 @@ config TCIC
"Bridge" is the name used for the hardware inside your computer that
PCMCIA cards are plugged into. If unsure, say N.
+config PCMCIA_M8XX
+ tristate "MPC8xx PCMCIA support"
+ depends on PCMCIA && PPC
+ select PCCARD_NONSTATIC
+ help
+ Say Y here to include support for PowerPC 8xx series PCMCIA
+ controller.
+
+ This driver is also available as a module called m8xx_pcmcia.
+
config HD64465_PCMCIA
tristate "HD64465 host bridge support"
depends on HD64465 && PCMCIA
diff --git a/drivers/pcmcia/Makefile b/drivers/pcmcia/Makefile
--- a/drivers/pcmcia/Makefile
+++ b/drivers/pcmcia/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_PD6729) += pd6729.o
obj-$(CONFIG_I82365) += i82365.o
obj-$(CONFIG_I82092) += i82092.o
obj-$(CONFIG_TCIC) += tcic.o
+obj-$(CONFIG_PCMCIA_M8XX) += m8xx_pcmcia.o
obj-$(CONFIG_HD64465_PCMCIA) += hd64465_ss.o
obj-$(CONFIG_PCMCIA_SA1100) += sa11xx_core.o sa1100_cs.o
obj-$(CONFIG_PCMCIA_SA1111) += sa11xx_core.o sa1111_cs.o
diff --git a/drivers/pcmcia/m8xx_pcmcia.c b/drivers/pcmcia/m8xx_pcmcia.c
new file mode 100644
--- /dev/null
+++ b/drivers/pcmcia/m8xx_pcmcia.c
@@ -0,0 +1,1295 @@
+/*
+ * m8xx_pcmcia.c - Linux PCMCIA socket driver for the mpc8xx series.
+ *
+ * (C) 1999-2000 Magnus Damm <damm@xxxxxxxxxxxx>
+ * (C) 2001-2002 Montavista Software, Inc.
+ * <mlocke@xxxxxxxxxx>
+ *
+ * Support for two slots by Cyclades Corporation
+ * <oliver.kurth@xxxxxxxxxxx>
+ * Further fixes, v2.6 kernel port
+ * <marcelo.tosatti@xxxxxxxxxxxx>
+ *
+ * "The ExCA standard specifies that socket controllers should provide
+ * two IO and five memory windows per socket, which can be independently
+ * configured and positioned in the host address space and mapped to
+ * arbitrary segments of card address space. " - David A Hinds. 1999
+ *
+ * This controller does _not_ meet the ExCA standard.
+ *
+ * m8xx pcmcia controller brief info:
+ * + 8 windows (attrib, mem, i/o)
+ * + up to two slots (SLOT_A and SLOT_B)
+ * + inputpins, outputpins, event and mask registers.
+ * - no offset register. sigh.
+ *
+ * Because of the lacking offset register we must map the whole card.
+ * We assign each memory window PCMCIA_MEM_WIN_SIZE address space.
+ * Make sure there is (PCMCIA_MEM_WIN_SIZE * PCMCIA_MEM_WIN_NO
+ * * PCMCIA_SOCKETS_NO) bytes at PCMCIA_MEM_WIN_BASE.
+ * The i/o windows are dynamically allocated at PCMCIA_IO_WIN_BASE.
+ * They are maximum 64KByte each...
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/fcntl.h>
+#include <linux/string.h>
+
+#include <asm/io.h>
+#include <asm/bitops.h>
+#include <asm/segment.h>
+#include <asm/system.h>
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/timer.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+
+#include <asm/mpc8xx.h>
+#include <asm/8xx_immap.h>
+#include <asm/irq.h>
+
+#include <pcmcia/version.h>
+#include <pcmcia/cs_types.h>
+#include <pcmcia/cs.h>
+#include <pcmcia/ss.h>
+
+#ifdef PCMCIA_DEBUG
+static int pc_debug = PCMCIA_DEBUG;
+module_param(pc_debug, int, 0);
+#define dprintk(args...) printk(KERN_DEBUG "m8xx_pcmcia: " args);
+#else
+#define dprintk(args...)
+#endif
+
+#define pcmcia_info(args...) printk(KERN_INFO "m8xx_pcmcia: "args)
+#define pcmcia_error(args...) printk(KERN_ERR "m8xx_pcmcia: "args)
+
+static const char *version = "Version 0.06, Aug 2005";
+MODULE_LICENSE("Dual MPL/GPL");
+
+#if !defined(CONFIG_PCMCIA_SLOT_A) && !defined(CONFIG_PCMCIA_SLOT_B)
+
+/* The RPX series use SLOT_B */
+#if defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE)
+#define CONFIG_PCMCIA_SLOT_B
+#define CONFIG_BD_IS_MHZ
+#endif
+
+/* The ADS board use SLOT_A */
+#ifdef CONFIG_ADS
+#define CONFIG_PCMCIA_SLOT_A
+#define CONFIG_BD_IS_MHZ
+#endif
+
+/* The FADS series are a mess */
+#ifdef CONFIG_FADS
+#if defined(CONFIG_MPC860T) || defined(CONFIG_MPC860) || defined(CONFIG_MPC821)
+#define CONFIG_PCMCIA_SLOT_A
+#else
+#define CONFIG_PCMCIA_SLOT_B
+#endif
+#endif
+
+/* Cyclades ACS uses both slots */
+#ifdef CONFIG_PRxK
+#define CONFIG_PCMCIA_SLOT_A
+#define CONFIG_PCMCIA_SLOT_B
+#endif
+
+#endif /* !defined(CONFIG_PCMCIA_SLOT_A) && !defined(CONFIG_PCMCIA_SLOT_B) */
+
+#if defined(CONFIG_PCMCIA_SLOT_A) && defined(CONFIG_PCMCIA_SLOT_B)
+
+#define PCMCIA_SOCKETS_NO 2
+/* We have only 8 windows, dualsocket support will be limited. */
+#define PCMCIA_MEM_WIN_NO 2
+#define PCMCIA_IO_WIN_NO 2
+#define PCMCIA_SLOT_MSG "SLOT_A and SLOT_B"
+
+#elif defined(CONFIG_PCMCIA_SLOT_A) || defined(CONFIG_PCMCIA_SLOT_B)
+
+#define PCMCIA_SOCKETS_NO 1
+/* full support for one slot */
+#define PCMCIA_MEM_WIN_NO 5
+#define PCMCIA_IO_WIN_NO 2
+
+/* define _slot_ to be able to optimize macros */
+
+#ifdef CONFIG_PCMCIA_SLOT_A
+#define _slot_ 0
+#define PCMCIA_SLOT_MSG "SLOT_A"
+#else
+#define _slot_ 1
+#define PCMCIA_SLOT_MSG "SLOT_B"
+#endif
+
+#else
+#error m8xx_pcmcia: Bad configuration!
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+#define PCMCIA_MEM_WIN_BASE 0xe0000000 /* base address for memory window 0 */
+#define PCMCIA_MEM_WIN_SIZE 0x04000000 /* each memory window is 64 MByte */
+#define PCMCIA_IO_WIN_BASE _IO_BASE /* base address for io window 0 */
+
+#define PCMCIA_SCHLVL PCMCIA_INTERRUPT /* Status Change Interrupt Level */
+
+/* ------------------------------------------------------------------------- */
+
+/* 2.4.x and newer has this always in HZ */
+#define M8XX_BUSFREQ ((((bd_t *)&(__res))->bi_busfreq))
+
+static int pcmcia_schlvl = PCMCIA_SCHLVL;
+
+spinlock_t events_lock = SPIN_LOCK_UNLOCKED;
+
+
+#define PCMCIA_SOCKET_KEY_5V 1
+#define PCMCIA_SOCKET_KEY_LV 2
+
+/* look up table for pgcrx registers */
+static u_int *m8xx_pgcrx[2] = {
+ &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pgcra,
+ &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pgcrb
+};
+
+/*
+ * This structure is used to address each window in the PCMCIA controller.
+ *
+ * Keep in mind that we assume that pcmcia_win_t[n+1] is mapped directly
+ * after pcmcia_win_t[n]...
+ */
+
+typedef struct {
+ uint br;
+ uint or;
+} pcmcia_win_t;
+
+/*
+ * For some reason the hardware guys decided to make both slots share
+ * some registers.
+ *
+ * Could someone invent object oriented hardware ?
+ *
+ * The macros are used to get the right bit from the registers.
+ * SLOT_A : slot = 0
+ * SLOT_B : slot = 1
+ */
+
+#define M8XX_PCMCIA_VS1(slot) (0x80000000 >> (slot << 4))
+#define M8XX_PCMCIA_VS2(slot) (0x40000000 >> (slot << 4))
+#define M8XX_PCMCIA_VS_MASK(slot) (0xc0000000 >> (slot << 4))
+#define M8XX_PCMCIA_VS_SHIFT(slot) (30 - (slot << 4))
+
+#define M8XX_PCMCIA_WP(slot) (0x20000000 >> (slot << 4))
+#define M8XX_PCMCIA_CD2(slot) (0x10000000 >> (slot << 4))
+#define M8XX_PCMCIA_CD1(slot) (0x08000000 >> (slot << 4))
+#define M8XX_PCMCIA_BVD2(slot) (0x04000000 >> (slot << 4))
+#define M8XX_PCMCIA_BVD1(slot) (0x02000000 >> (slot << 4))
+#define M8XX_PCMCIA_RDY(slot) (0x01000000 >> (slot << 4))
+#define M8XX_PCMCIA_RDY_L(slot) (0x00800000 >> (slot << 4))
+#define M8XX_PCMCIA_RDY_H(slot) (0x00400000 >> (slot << 4))
+#define M8XX_PCMCIA_RDY_R(slot) (0x00200000 >> (slot << 4))
+#define M8XX_PCMCIA_RDY_F(slot) (0x00100000 >> (slot << 4))
+#define M8XX_PCMCIA_MASK(slot) (0xFFFF0000 >> (slot << 4))
+
+#define M8XX_PCMCIA_POR_VALID 0x00000001
+#define M8XX_PCMCIA_POR_WRPROT 0x00000002
+#define M8XX_PCMCIA_POR_ATTRMEM 0x00000010
+#define M8XX_PCMCIA_POR_IO 0x00000018
+#define M8XX_PCMCIA_POR_16BIT 0x00000040
+
+#define M8XX_PGCRX(slot) (*m8xx_pgcrx[slot])
+
+#define M8XX_PGCRX_CXOE 0x00000080
+#define M8XX_PGCRX_CXRESET 0x00000040
+
+/* we keep one lookup table per socket to check flags */
+
+#define PCMCIA_EVENTS_MAX 5 /* 4 max at a time + termination */
+
+typedef struct {
+ u_int regbit;
+ u_int eventbit;
+} event_table_t;
+
+typedef struct socket_info_t {
+ void (*handler)(void *info, u_int events);
+ void *info;
+
+ u_int slot;
+
+ socket_state_t state;
+ struct pccard_mem_map mem_win[PCMCIA_MEM_WIN_NO];
+ struct pccard_io_map io_win[PCMCIA_IO_WIN_NO];
+ event_table_t events[PCMCIA_EVENTS_MAX];
+ struct pcmcia_socket socket;
+} socket_info_t;
+
+static socket_info_t socket[PCMCIA_SOCKETS_NO];
+
+/*
+ * Search this table to see if the windowsize is
+ * supported...
+ */
+
+#define M8XX_SIZES_NO 32
+
+static const u_int m8xx_size_to_gray[M8XX_SIZES_NO] =
+{
+ 0x00000001, 0x00000002, 0x00000008, 0x00000004,
+ 0x00000080, 0x00000040, 0x00000010, 0x00000020,
+ 0x00008000, 0x00004000, 0x00001000, 0x00002000,
+ 0x00000100, 0x00000200, 0x00000800, 0x00000400,
+
+ 0x0fffffff, 0xffffffff, 0xffffffff, 0xffffffff,
+ 0x01000000, 0x02000000, 0xffffffff, 0x04000000,
+ 0x00010000, 0x00020000, 0x00080000, 0x00040000,
+ 0x00800000, 0x00400000, 0x00100000, 0x00200000
+};
+
+/* ------------------------------------------------------------------------- */
+
+static irqreturn_t m8xx_interrupt(int irq, void *dev, struct pt_regs *regs);
+
+#define PCMCIA_BMT_LIMIT (15*4) /* Bus Monitor Timeout value */
+
+/* ------------------------------------------------------------------------- */
+/* board specific stuff: */
+/* voltage_set(), hardware_enable() and hardware_disable() */
+/* ------------------------------------------------------------------------- */
+/* RPX Boards from Embedded Planet */
+
+#if defined(CONFIG_RPXCLASSIC) || defined(CONFIG_RPXLITE)
+
+/* The RPX boards seems to have it's bus monitor timeout set to 6*8 clocks.
+ * SYPCR is write once only, therefore must the slowest memory be faster
+ * than the bus monitor or we will get a machine check due to the bus timeout.
+ */
+
+#define PCMCIA_BOARD_MSG "RPX CLASSIC or RPX LITE"
+
+#undef PCMCIA_BMT_LIMIT
+#define PCMCIA_BMT_LIMIT (6*8)
+
+static int voltage_set(int slot, int vcc, int vpp)
+{
+ u_int reg = 0;
+
+ switch(vcc) {
+ case 0: break;
+ case 33:
+ reg |= BCSR1_PCVCTL4;
+ break;
+ case 50:
+ reg |= BCSR1_PCVCTL5;
+ break;
+ default:
+ return 1;
+ }
+
+ switch(vpp) {
+ case 0: break;
+ case 33:
+ case 50:
+ if(vcc == vpp)
+ reg |= BCSR1_PCVCTL6;
+ else
+ return 1;
+ break;
+ case 120:
+ reg |= BCSR1_PCVCTL7;
+ default:
+ return 1;
+ }
+
+ if(!((vcc == 50) || (vcc == 0)))
+ return 1;
+
+ /* first, turn off all power */
+
+ *((uint *)RPX_CSR_ADDR) &= ~(BCSR1_PCVCTL4 | BCSR1_PCVCTL5
+ | BCSR1_PCVCTL6 | BCSR1_PCVCTL7);
+
+ /* enable new powersettings */
+
+ *((uint *)RPX_CSR_ADDR) |= reg;
+
+ return 0;
+}
+
+#define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
+#define hardware_enable(_slot_) /* No hardware to enable */
+#define hardware_disable(_slot_) /* No hardware to disable */
+
+#endif /* CONFIG_RPXCLASSIC */
+
+/* FADS Boards from Motorola */
+
+#if defined(CONFIG_FADS)
+
+#define PCMCIA_BOARD_MSG "FADS"
+
+static int voltage_set(int slot, int vcc, int vpp)
+{
+ uint reg = 0;
+
+ switch(vcc) {
+ case 0:
+ break;
+ case 33:
+ reg |= BCSR1_PCCVCC0;
+ break;
+ case 50:
+ reg |= BCSR1_PCCVCC1;
+ break;
+ default:
+ return 1;
+ }
+
+ switch(vpp) {
+ case 0:
+ break;
+ case 33:
+ case 50:
+ if(vcc == vpp)
+ reg |= BCSR1_PCCVPP1;
+ else
+ return 1;
+ break;
+ case 120:
+ if ((vcc == 33) || (vcc == 50))
+ reg |= BCSR1_PCCVPP0;
+ else
+ return 1;
+ default:
+ return 1;
+ }
+
+ /* first, turn off all power */
+ *((uint *)BCSR1) &= ~(BCSR1_PCCVCC_MASK | BCSR1_PCCVPP_MASK);
+
+ /* enable new powersettings */
+ *((uint *)BCSR1) |= reg;
+
+ return 0;
+}
+
+#define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
+
+static void hardware_enable(int slot)
+{
+ *((uint *)BCSR1) &= ~BCSR1_PCCEN;
+}
+
+static void hardware_disable(int slot)
+{
+ *((uint *)BCSR1) |= BCSR1_PCCEN;
+}
+
+#endif
+
+/* ------------------------------------------------------------------------- */
+/* Motorola MBX860 */
+
+#if defined(CONFIG_MBX)
+
+#define PCMCIA_BOARD_MSG "MBX"
+
+static int voltage_set(int slot, int vcc, int vpp)
+{
+ unsigned char reg = 0;
+
+ switch(vcc) {
+ case 0:
+ break;
+ case 33:
+ reg |= CSR2_VCC_33;
+ break;
+ case 50:
+ reg |= CSR2_VCC_50;
+ break;
+ default:
+ return 1;
+ }
+
+ switch(vpp) {
+ case 0:
+ break;
+ case 33:
+ case 50:
+ if(vcc == vpp)
+ reg |= CSR2_VPP_VCC;
+ else
+ return 1;
+ break;
+ case 120:
+ if ((vcc == 33) || (vcc == 50))
+ reg |= CSR2_VPP_12;
+ else
+ return 1;
+ default:
+ return 1;
+ }
+
+ /* first, turn off all power */
+ *((unsigned char *)MBX_CSR2_ADDR) &= ~(CSR2_VCC_MASK | CSR2_VPP_MASK);
+
+ /* enable new powersettings */
+ *((unsigned char *)MBX_CSR2_ADDR) |= reg;
+
+ return 0;
+}
+
+#define socket_get(_slot_) PCMCIA_SOCKET_KEY_5V
+#define hardware_enable(_slot_) /* No hardware to enable */
+#define hardware_disable(_slot_) /* No hardware to disable */
+
+#endif /* CONFIG_MBX */
+
+#if defined(CONFIG_PRxK)
+#include <asm/cpld.h>
+extern volatile fpga_pc_regs *fpga_pc;
+
+#define PCMCIA_BOARD_MSG "MPC855T"
+
+static int voltage_set(int slot, int vcc, int vpp)
+{
+ unsigned char reg = 0;
+ unsigned char regread;
+ cpld_regs *ccpld = get_cpld();
+
+ switch(vcc) {
+ case 0:
+ break;
+ case 33:
+ reg |= PCMCIA_VCC_33;
+ break;
+ case 50:
+ reg |= PCMCIA_VCC_50;
+ break;
+ default:
+ return 1;
+ }
+
+ switch(vpp) {
+ case 0:
+ break;
+ case 33:
+ case 50:
+ if(vcc == vpp)
+ reg |= PCMCIA_VPP_VCC;
+ else
+ return 1;
+ break;
+ case 120:
+ if ((vcc == 33) || (vcc == 50))
+ reg |= PCMCIA_VPP_12;
+ else
+ return 1;
+ default:
+ return 1;
+ }
+
+ reg = reg >> (slot << 2);
+ regread = ccpld->fpga_pc_ctl;
+ if (reg != (regread & ((PCMCIA_VCC_MASK | PCMCIA_VPP_MASK) >> (slot << 2)))) {
+ /* enable new powersettings */
+ regread = regread & ~((PCMCIA_VCC_MASK | PCMCIA_VPP_MASK) >> (slot << 2));
+ ccpld->fpga_pc_ctl = reg | regread;
+ mdelay(100);
+ }
+
+ return 0;
+}
+
+#define socket_get(_slot_) PCMCIA_SOCKET_KEY_LV
+#define hardware_enable(_slot_) /* No hardware to enable */
+#define hardware_disable(_slot_) /* No hardware to disable */
+
+#endif /* CONFIG_PRxK */
+
+static void m8xx_shutdown(void)
+{
+ u_int m, i;
+ pcmcia_win_t *w;
+
+ for(i = 0; i < PCMCIA_SOCKETS_NO; i++){
+ w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
+
+ ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr =
+ M8XX_PCMCIA_MASK(i);
+ ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per
+ &= ~M8XX_PCMCIA_MASK(i);
+
+ /* turn off interrupt and disable CxOE */
+ M8XX_PGCRX(i) = M8XX_PGCRX_CXOE;
+
+ /* turn off memory windows */
+ for(m = 0; m < PCMCIA_MEM_WIN_NO; m++) {
+ w->or = 0; /* set to not valid */
+ w++;
+ }
+
+ /* turn off voltage */
+ voltage_set(i, 0, 0);
+
+ /* disable external hardware */
+ hardware_disable(i);
+ }
+
+ free_irq(pcmcia_schlvl, NULL);
+}
+
+/* copied from tcic.c */
+
+static int m8xx_drv_suspend(struct device *dev, u32 state, u32 level)
+{
+ int ret = 0;
+ if (level == SUSPEND_SAVE_STATE)
+ ret = pcmcia_socket_dev_suspend(dev, state);
+ return ret;
+}
+
+static int m8xx_drv_resume(struct device *dev, u32 level)
+{
+ int ret = 0;
+ if (level == RESUME_RESTORE_STATE)
+ ret = pcmcia_socket_dev_resume(dev);
+ return ret;
+}
+
+static struct device_driver m8xx_driver = {
+ .name = "m8xx-pcmcia",
+ .bus = &platform_bus_type,
+ .suspend = m8xx_drv_suspend,
+ .resume = m8xx_drv_resume,
+};
+
+static struct platform_device m8xx_device = {
+ .name = "m8xx-pcmcia",
+ .id = 0,
+};
+
+static u_int pending_events[PCMCIA_SOCKETS_NO];
+static spinlock_t pending_event_lock = SPIN_LOCK_UNLOCKED;
+
+static irqreturn_t m8xx_interrupt(int irq, void *dev, struct pt_regs *regs)
+{
+ socket_info_t *s;
+ event_table_t *e;
+ u_int i, events, pscr, pipr, per;
+
+ dprintk("Interrupt!\n");
+ /* get interrupt sources */
+
+ pscr = ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr;
+ pipr = ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pipr;
+ per = ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per;
+
+ for(i = 0; i < PCMCIA_SOCKETS_NO; i++) {
+ s = &socket[i];
+ e = &s->events[0];
+ events = 0;
+
+ while(e->regbit) {
+ if(pscr & e->regbit)
+ events |= e->eventbit;
+
+ e++;
+ }
+
+ /*
+ * report only if both card detect signals are the same
+ * not too nice done,
+ * we depend on that CD2 is the bit to the left of CD1...
+ */
+ if(events & SS_DETECT)
+ if(((pipr & M8XX_PCMCIA_CD2(i)) >> 1) ^
+ (pipr & M8XX_PCMCIA_CD1(i)))
+ {
+ events &= ~SS_DETECT;
+ }
+
+#ifdef PCMCIA_GLITCHY_CD
+ /*
+ * I've experienced CD problems with my ADS board.
+ * We make an extra check to see if there was a
+ * real change of Card detection.
+ */
+
+ if((events & SS_DETECT) &&
+ ((pipr &
+ (M8XX_PCMCIA_CD2(i) | M8XX_PCMCIA_CD1(i))) == 0) &&
+ (s->state.Vcc | s->state.Vpp)) {
+ events &= ~SS_DETECT;
+ /*printk( "CD glitch workaround - CD = 0x%08x!\n",
+ (pipr & (M8XX_PCMCIA_CD2(i)
+ | M8XX_PCMCIA_CD1(i))));*/
+ }
+#endif
+
+ /* call the handler */
+
+ dprintk("slot %u: events = 0x%02x, pscr = 0x%08x, "
+ "pipr = 0x%08x\n",
+ i, events, pscr, pipr);
+
+ if(events) {
+ spin_lock(&pending_event_lock);
+ pending_events[i] |= events;
+ spin_unlock(&pending_event_lock);
+ /*
+ * Turn off RDY_L bits in the PER mask on
+ * CD interrupt receival.
+ *
+ * They can generate bad interrupts on the
+ * ACS4,8,16,32. - marcelo
+ */
+ per &= ~M8XX_PCMCIA_RDY_L(0);
+ per &= ~M8XX_PCMCIA_RDY_L(1);
+
+ ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per = per;
+
+ if (events)
+ pcmcia_parse_events(&socket[i].socket, events);
+ }
+ }
+
+ /* clear the interrupt sources */
+ ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr = pscr;
+
+ dprintk("Interrupt done.\n");
+
+ return IRQ_HANDLED;
+}
+
+static u_int m8xx_get_graycode(u_int size)
+{
+ u_int k;
+
+ for(k = 0; k < M8XX_SIZES_NO; k++)
+ if(m8xx_size_to_gray[k] == size)
+ break;
+
+ if((k == M8XX_SIZES_NO) || (m8xx_size_to_gray[k] == -1))
+ k = -1;
+
+ return k;
+}
+
+static u_int m8xx_get_speed(u_int ns, u_int is_io)
+{
+ u_int reg, clocks, psst, psl, psht;
+
+ if(!ns) {
+
+ /*
+ * We get called with IO maps setup to 0ns
+ * if not specified by the user.
+ * They should be 255ns.
+ */
+
+ if(is_io)
+ ns = 255;
+ else
+ ns = 100; /* fast memory if 0 */
+ }
+
+ /*
+ * In PSST, PSL, PSHT fields we tell the controller
+ * timing parameters in CLKOUT clock cycles.
+ * CLKOUT is the same as GCLK2_50.
+ */
+
+/* how we want to adjust the timing - in percent */
+
+#define ADJ 180 /* 80 % longer accesstime - to be sure */
+
+ clocks = ((M8XX_BUSFREQ / 1000) * ns) / 1000;
+ clocks = (clocks * ADJ) / (100*1000);
+ if(clocks >= PCMCIA_BMT_LIMIT) {
+ printk( "Max access time limit reached\n");
+ clocks = PCMCIA_BMT_LIMIT-1;
+ }
+
+ psst = clocks / 7; /* setup time */
+ psht = clocks / 7; /* hold time */
+ psl = (clocks * 5) / 7; /* strobe length */
+
+ psst += clocks - (psst + psht + psl);
+
+ reg = psst << 12;
+ reg |= psl << 7;
+ reg |= psht << 16;
+
+ return reg;
+}
+
+static int m8xx_get_status(struct pcmcia_socket *sock, u_int *value)
+{
+ int lsock = container_of(sock, struct socket_info_t, socket)->slot;
+ socket_info_t *s = &socket[lsock];
+ u_int pipr, reg;
+
+ pipr = ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pipr;
+
+ *value = ((pipr & (M8XX_PCMCIA_CD1(lsock)
+ | M8XX_PCMCIA_CD2(lsock))) == 0) ? SS_DETECT : 0;
+ *value |= (pipr & M8XX_PCMCIA_WP(lsock)) ? SS_WRPROT : 0;
+
+ if (s->state.flags & SS_IOCARD)
+ *value |= (pipr & M8XX_PCMCIA_BVD1(lsock)) ? SS_STSCHG : 0;
+ else {
+ *value |= (pipr & M8XX_PCMCIA_RDY(lsock)) ? SS_READY : 0;
+ *value |= (pipr & M8XX_PCMCIA_BVD1(lsock)) ? SS_BATDEAD : 0;
+ *value |= (pipr & M8XX_PCMCIA_BVD2(lsock)) ? SS_BATWARN : 0;
+ }
+
+ if (s->state.Vcc | s->state.Vpp)
+ *value |= SS_POWERON;
+
+ /*
+ * Voltage detection:
+ * This driver only supports 16-Bit pc-cards.
+ * Cardbus is not handled here.
+ *
+ * To determine what voltage to use we must read the VS1 and VS2 pin.
+ * Depending on what socket type is present,
+ * different combinations mean different things.
+ *
+ * Card Key Socket Key VS1 VS2 Card Vcc for CIS parse
+ *
+ * 5V 5V, LV* NC NC 5V only 5V (if available)
+ *
+ * 5V 5V, LV* GND NC 5 or 3.3V as low as possible
+ *
+ * 5V 5V, LV* GND GND 5, 3.3, x.xV as low as possible
+ *
+ * LV* 5V - - shall not fit into socket
+ *
+ * LV* LV* GND NC 3.3V only 3.3V
+ *
+ * LV* LV* NC GND x.xV x.xV (if avail.)
+ *
+ * LV* LV* GND GND 3.3 or x.xV as low as possible
+ *
+ * *LV means Low Voltage
+ *
+ *
+ * That gives us the following table:
+ *
+ * Socket VS1 VS2 Voltage
+ *
+ * 5V NC NC 5V
+ * 5V NC GND none (should not be possible)
+ * 5V GND NC >= 3.3V
+ * 5V GND GND >= x.xV
+ *
+ * LV NC NC 5V (if available)
+ * LV NC GND x.xV (if available)
+ * LV GND NC 3.3V
+ * LV GND GND >= x.xV
+ *
+ * So, how do I determine if I have a 5V or a LV
+ * socket on my board? Look at the socket!
+ *
+ *
+ * Socket with 5V key:
+ * ++--------------------------------------------+
+ * || |
+ * || ||
+ * || ||
+ * | |
+ * +---------------------------------------------+
+ *
+ * Socket with LV key:
+ * ++--------------------------------------------+
+ * || |
+ * | ||
+ * | ||
+ * | |
+ * +---------------------------------------------+
+ *
+ *
+ * With other words - LV only cards does not fit
+ * into the 5V socket!
+ */
+
+ /* read out VS1 and VS2 */
+
+ reg = (pipr & M8XX_PCMCIA_VS_MASK(lsock))
+ >> M8XX_PCMCIA_VS_SHIFT(lsock);
+
+ if(socket_get(lsock) == PCMCIA_SOCKET_KEY_LV) {
+ switch(reg) {
+ case 1:
+ *value |= SS_3VCARD;
+ break; /* GND, NC - 3.3V only */
+ case 2:
+ *value |= SS_XVCARD;
+ break; /* NC. GND - x.xV only */
+ };
+ }
+
+ dprintk("GetStatus(%d) = %#2.2x\n", lsock, *value);
+ return 0;
+}
+
+static int m8xx_get_socket(struct pcmcia_socket *sock, socket_state_t *state)
+{
+ int lsock = container_of(sock, struct socket_info_t, socket)->slot;
+ *state = socket[lsock].state; /* copy the whole structure */
+
+ dprintk("GetSocket(%d) = flags %#3.3x, Vcc %d, Vpp %d, "
+ "io_irq %d, csc_mask %#2.2x\n", lsock, state->flags,
+ state->Vcc, state->Vpp, state->io_irq, state->csc_mask);
+ return 0;
+}
+
+static int m8xx_set_socket(struct pcmcia_socket *sock, socket_state_t *state)
+{
+ int lsock = container_of(sock, struct socket_info_t, socket)->slot;
+ socket_info_t *s = &socket[lsock];
+ event_table_t *e;
+ u_int reg;
+ u_long flags;
+
+ dprintk( "SetSocket(%d, flags %#3.3x, Vcc %d, Vpp %d, "
+ "io_irq %d, csc_mask %#2.2x)\n", lsock, state->flags,
+ state->Vcc, state->Vpp, state->io_irq, state->csc_mask);
+
+ /* First, set voltage - bail out if invalid */
+ if(voltage_set(lsock, state->Vcc, state->Vpp))
+ return -EINVAL;
+
+ /* Take care of reset... */
+ if(state->flags & SS_RESET)
+ M8XX_PGCRX(lsock) |= M8XX_PGCRX_CXRESET; /* active high */
+ else
+ M8XX_PGCRX(lsock) &= ~M8XX_PGCRX_CXRESET;
+
+ /* ... and output enable. */
+
+ /* The CxOE signal is connected to a 74541 on the ADS.
+ I guess most other boards used the ADS as a reference.
+ I tried to control the CxOE signal with SS_OUTPUT_ENA,
+ but the reset signal seems connected via the 541.
+ If the CxOE is left high are some signals tristated and
+ no pullups are present -> the cards act wierd.
+ So right now the buffers are enabled if the power is on. */
+
+ if(state->Vcc || state->Vpp)
+ M8XX_PGCRX(lsock) &= ~M8XX_PGCRX_CXOE; /* active low */
+ else
+ M8XX_PGCRX(lsock) |= M8XX_PGCRX_CXOE;
+
+ /*
+ * We'd better turn off interrupts before
+ * we mess with the events-table..
+ */
+
+ spin_lock_irqsave(&events_lock, flags);
+
+ /*
+ * Play around with the interrupt mask to be able to
+ * give the events the generic pcmcia driver wants us to.
+ */
+
+ e = &s->events[0];
+ reg = 0;
+
+ if(state->csc_mask & SS_DETECT) {
+ e->eventbit = SS_DETECT;
+ reg |= e->regbit = (M8XX_PCMCIA_CD2(lsock)
+ | M8XX_PCMCIA_CD1(lsock));
+ e++;
+ }
+ if(state->flags & SS_IOCARD) {
+ /*
+ * I/O card
+ */
+ if(state->csc_mask & SS_STSCHG) {
+ e->eventbit = SS_STSCHG;
+ reg |= e->regbit = M8XX_PCMCIA_BVD1(lsock);
+ e++;
+ }
+ /*
+ * If io_irq is non-zero we should enable irq.
+ */
+ if(state->io_irq) {
+ M8XX_PGCRX(lsock) |=
+ mk_int_int_mask(state->io_irq) << 24;
+ /*
+ * Strange thing here:
+ * The manual does not tell us which interrupt
+ * the sources generate.
+ * Anyhow, I found out that RDY_L generates IREQLVL.
+ *
+ * We use level triggerd interrupts, and they don't
+ * have to be cleared in PSCR in the interrupt handler.
+ */
+ reg |= M8XX_PCMCIA_RDY_L(lsock);
+ }
+ else
+ M8XX_PGCRX(lsock) &= 0x00ffffff;
+ }
+ else {
+ /*
+ * Memory card
+ */
+ if(state->csc_mask & SS_BATDEAD) {
+ e->eventbit = SS_BATDEAD;
+ reg |= e->regbit = M8XX_PCMCIA_BVD1(lsock);
+ e++;
+ }
+ if(state->csc_mask & SS_BATWARN) {
+ e->eventbit = SS_BATWARN;
+ reg |= e->regbit = M8XX_PCMCIA_BVD2(lsock);
+ e++;
+ }
+ /* What should I trigger on - low/high,raise,fall? */
+ if(state->csc_mask & SS_READY) {
+ e->eventbit = SS_READY;
+ reg |= e->regbit = 0; //??
+ e++;
+ }
+ }
+
+ e->regbit = 0; /* terminate list */
+
+ /*
+ * Clear the status changed .
+ * Port A and Port B share the same port.
+ * Writing ones will clear the bits.
+ */
+
+ ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr = reg;
+
+ /*
+ * Write the mask.
+ * Port A and Port B share the same port.
+ * Need for read-modify-write.
+ * Ones will enable the interrupt.
+ */
+
+ /*
+ reg |= ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per
+ & M8XX_PCMCIA_MASK(lsock);
+ */
+
+ reg |= ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per
+ & ( M8XX_PCMCIA_MASK(0) | M8XX_PCMCIA_MASK(1) );
+
+ ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per = reg;
+
+ spin_unlock_irqrestore(&events_lock, flags);
+
+ /* copy the struct and modify the copy */
+
+ s->state = *state;
+
+ return 0;
+}
+
+static int m8xx_set_io_map(struct pcmcia_socket *sock, struct pccard_io_map *io)
+{
+ int lsock = container_of(sock, struct socket_info_t, socket)->slot;
+
+ socket_info_t *s = &socket[lsock];
+ pcmcia_win_t *w;
+ u_int reg, winnr;
+
+
+#define M8XX_SIZE (io->stop - io->start + 1)
+#define M8XX_BASE (PCMCIA_IO_WIN_BASE + io->start)
+
+ dprintk( "SetIOMap(%d, %d, %#2.2x, %d ns, "
+ "%#4.4x-%#4.4x)\n", lsock, io->map, io->flags,
+ io->speed, io->start, io->stop);
+
+ if ((io->map >= PCMCIA_IO_WIN_NO) || (io->start > 0xffff)
+ || (io->stop > 0xffff) || (io->stop < io->start))
+ return -EINVAL;
+
+ if((reg = m8xx_get_graycode(M8XX_SIZE)) == -1)
+ return -EINVAL;
+
+ if(io->flags & MAP_ACTIVE) {
+
+ dprintk( "io->flags & MAP_ACTIVE\n");
+
+ winnr = (PCMCIA_MEM_WIN_NO * PCMCIA_SOCKETS_NO)
+ + (lsock * PCMCIA_IO_WIN_NO) + io->map;
+
+ /* setup registers */
+
+ w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
+ w += winnr;
+
+ w->or = 0; /* turn off window first */
+ w->br = M8XX_BASE;
+
+ reg <<= 27;
+ reg |= M8XX_PCMCIA_POR_IO |(lsock << 2);
+
+ reg |= m8xx_get_speed(io->speed, 1);
+
+ if(io->flags & MAP_WRPROT)
+ reg |= M8XX_PCMCIA_POR_WRPROT;
+
+ /*if(io->flags & (MAP_16BIT | MAP_AUTOSZ))*/
+ if(io->flags & MAP_16BIT)
+ reg |= M8XX_PCMCIA_POR_16BIT;
+
+ if(io->flags & MAP_ACTIVE)
+ reg |= M8XX_PCMCIA_POR_VALID;
+
+ w->or = reg;
+
+ dprintk("Socket %u: Mapped io window %u at %#8.8x, "
+ "OR = %#8.8x.\n", lsock, io->map, w->br, w->or);
+ } else {
+ /* shutdown IO window */
+ winnr = (PCMCIA_MEM_WIN_NO * PCMCIA_SOCKETS_NO)
+ + (lsock * PCMCIA_IO_WIN_NO) + io->map;
+
+ /* setup registers */
+
+ w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
+ w += winnr;
+
+ w->or = 0; /* turn off window */
+ w->br = 0; /* turn off base address */
+
+ dprintk("Socket %u: Unmapped io window %u at %#8.8x, "
+ "OR = %#8.8x.\n", lsock, io->map, w->br, w->or);
+ }
+
+ /* copy the struct and modify the copy */
+ s->io_win[io->map] = *io;
+ s->io_win[io->map].flags &= (MAP_WRPROT
+ | MAP_16BIT
+ | MAP_ACTIVE);
+ dprintk("SetIOMap exit\n");
+
+ return 0;
+}
+
+static int m8xx_set_mem_map(struct pcmcia_socket *sock, struct pccard_mem_map *mem)
+{
+ int lsock = container_of(sock, struct socket_info_t, socket)->slot;
+ socket_info_t *s = &socket[lsock];
+ pcmcia_win_t *w;
+ struct pccard_mem_map *old;
+ u_int reg, winnr;
+
+ dprintk( "SetMemMap(%d, %d, %#2.2x, %d ns, "
+ "%#5.5lx, %#5.5x)\n", lsock, mem->map, mem->flags,
+ mem->speed, mem->static_start, mem->card_start);
+
+ if ((mem->map >= PCMCIA_MEM_WIN_NO)
+// || ((mem->s) >= PCMCIA_MEM_WIN_SIZE)
+ || (mem->card_start >= 0x04000000)
+ || (mem->static_start & 0xfff) /* 4KByte resolution */
+ || (mem->card_start & 0xfff))
+ return -EINVAL;
+
+ if((reg = m8xx_get_graycode(PCMCIA_MEM_WIN_SIZE)) == -1) {
+ printk( "Cannot set size to 0x%08x.\n", PCMCIA_MEM_WIN_SIZE);
+ return -EINVAL;
+ }
+ reg <<= 27;
+
+ winnr = (lsock * PCMCIA_MEM_WIN_NO) + mem->map;
+
+ /* Setup the window in the pcmcia controller */
+
+ w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
+ w += winnr;
+
+ reg |= lsock << 2;
+
+ reg |= m8xx_get_speed(mem->speed, 0);
+
+ if(mem->flags & MAP_ATTRIB)
+ reg |= M8XX_PCMCIA_POR_ATTRMEM;
+
+ if(mem->flags & MAP_WRPROT)
+ reg |= M8XX_PCMCIA_POR_WRPROT;
+
+ if(mem->flags & MAP_16BIT)
+ reg |= M8XX_PCMCIA_POR_16BIT;
+
+ if(mem->flags & MAP_ACTIVE)
+ reg |= M8XX_PCMCIA_POR_VALID;
+
+ w->or = reg;
+
+ dprintk("Socket %u: Mapped memory window %u at %#8.8x, "
+ "OR = %#8.8x.\n", lsock, mem->map, w->br, w->or);
+
+ if(mem->flags & MAP_ACTIVE) {
+ /* get the new base address */
+ mem->static_start = PCMCIA_MEM_WIN_BASE +
+ (PCMCIA_MEM_WIN_SIZE * winnr)
+ + mem->card_start;
+ }
+
+ dprintk("SetMemMap(%d, %d, %#2.2x, %d ns, "
+ "%#5.5lx, %#5.5x)\n", lsock, mem->map, mem->flags,
+ mem->speed, mem->static_start, mem->card_start);
+
+ /* copy the struct and modify the copy */
+
+ old = &s->mem_win[mem->map];
+
+ *old = *mem;
+ old->flags &= (MAP_ATTRIB
+ | MAP_WRPROT
+ | MAP_16BIT
+ | MAP_ACTIVE);
+
+ return 0;
+}
+
+static int m8xx_sock_init(struct pcmcia_socket *sock)
+{
+ int i;
+ pccard_io_map io = { 0, 0, 0, 0, 1 };
+ pccard_mem_map mem = { 0, 0, 0, 0, 0, 0 };
+
+ dprintk( "sock_init(%d)\n", s);
+
+ m8xx_set_socket(sock, &dead_socket);
+ for (i = 0; i < PCMCIA_IO_WIN_NO; i++) {
+ io.map = i;
+ m8xx_set_io_map(sock, &io);
+ }
+ for (i = 0; i < PCMCIA_MEM_WIN_NO; i++) {
+ mem.map = i;
+ m8xx_set_mem_map(sock, &mem);
+ }
+
+ return 0;
+
+}
+
+static int m8xx_suspend(struct pcmcia_socket *sock)
+{
+ return m8xx_set_socket(sock, &dead_socket);
+}
+
+static struct pccard_operations m8xx_services = {
+ .init = m8xx_sock_init,
+ .suspend = m8xx_suspend,
+ .get_status = m8xx_get_status,
+ .get_socket = m8xx_get_socket,
+ .set_socket = m8xx_set_socket,
+ .set_io_map = m8xx_set_io_map,
+ .set_mem_map = m8xx_set_mem_map,
+};
+
+static int __init m8xx_init(void)
+{
+ pcmcia_win_t *w;
+ u_int i,m;
+
+ pcmcia_info("%s\n", version);
+
+ if (driver_register(&m8xx_driver))
+ return -1;
+
+ pcmcia_info(PCMCIA_BOARD_MSG " using " PCMCIA_SLOT_MSG
+ " with IRQ %u.\n", pcmcia_schlvl);
+
+ /* Configure Status change interrupt */
+
+ if(request_irq(pcmcia_schlvl, m8xx_interrupt, 0,
+ "m8xx_pcmcia", NULL)) {
+ pcmcia_error("Cannot allocate IRQ %u for SCHLVL!\n",
+ pcmcia_schlvl);
+ return -1;
+ }
+
+ w = (void *) &((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pbr0;
+
+ ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_pscr =
+ M8XX_PCMCIA_MASK(0)| M8XX_PCMCIA_MASK(1);
+ ((immap_t *)IMAP_ADDR)->im_pcmcia.pcmc_per
+ &= ~(M8XX_PCMCIA_MASK(0)| M8XX_PCMCIA_MASK(1));
+
+/* connect interrupt and disable CxOE */
+
+ M8XX_PGCRX(0) = M8XX_PGCRX_CXOE |
+ (mk_int_int_mask(pcmcia_schlvl) << 16);
+ M8XX_PGCRX(1) = M8XX_PGCRX_CXOE |
+ (mk_int_int_mask(pcmcia_schlvl) << 16);
+
+/* intialize the fixed memory windows */
+
+ for(i = 0; i < PCMCIA_SOCKETS_NO; i++){
+ for(m = 0; m < PCMCIA_MEM_WIN_NO; m++) {
+ w->br = PCMCIA_MEM_WIN_BASE +
+ (PCMCIA_MEM_WIN_SIZE
+ * (m + i * PCMCIA_MEM_WIN_NO));
+
+ w->or = 0; /* set to not valid */
+
+ w++;
+ }
+ }
+
+/* turn off voltage */
+ voltage_set(0, 0, 0);
+ voltage_set(1, 0, 0);
+
+/* Enable external hardware */
+ hardware_enable(0);
+ hardware_enable(1);
+
+ platform_device_register(&m8xx_device);
+
+ for (i = 0 ; i < PCMCIA_SOCKETS_NO; i++) {
+ socket[i].slot = i;
+ socket[i].socket.owner = THIS_MODULE;
+ socket[i].socket.features = SS_CAP_PCCARD | SS_CAP_MEM_ALIGN | SS_CAP_STATIC_MAP;
+ socket[i].socket.irq_mask = 0x000;
+ socket[i].socket.map_size = 0x1000;
+ socket[i].socket.io_offset = 0;
+ socket[i].socket.pci_irq = i ? 7 : 9;
+ socket[i].socket.ops = &m8xx_services;
+ socket[i].socket.resource_ops = &pccard_nonstatic_ops;
+ socket[i].socket.cb_dev = NULL;
+ socket[i].socket.dev.dev = &m8xx_device.dev;
+ }
+
+ for (i = 0; i < PCMCIA_SOCKETS_NO; i++)
+ pcmcia_register_socket(&socket[i].socket);
+
+ return 0;
+}
+
+static void __exit m8xx_exit(void)
+{
+ int i;
+
+ for (i = 0; i < PCMCIA_SOCKETS_NO; i++)
+ pcmcia_unregister_socket(&socket[i].socket);
+
+ m8xx_shutdown();
+
+ platform_device_unregister(&m8xx_device);
+ driver_unregister(&m8xx_driver);
+}
+
+module_init(m8xx_init);
+module_exit(m8xx_exit);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/