Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 586 insertions, 0 deletions

diff --git a/drivers/net/wan/cycx_drv.c b/drivers/net/wan/cycx_drv.c
new file mode 100644
index 0000000..6e74af6
--- /dev/null
+++ b/drivers/net/wan/cycx_drv.c
@@ -0,0 +1,586 @@
+/*
+* cycx_drv.c	Cyclom 2X Support Module.
+*
+*		This module is a library of common hardware specific
+*		functions used by the Cyclades Cyclom 2X sync card.
+*
+* Author:	Arnaldo Carvalho de Melo <acme@conectiva.com.br>
+*
+* Copyright:	(c) 1998-2003 Arnaldo Carvalho de Melo
+*
+* Based on sdladrv.c by Gene Kozin <genek@compuserve.com>
+*
+*		This program is free software; you can redistribute it and/or
+*		modify it under the terms of the GNU General Public License
+*		as published by the Free Software Foundation; either version
+*		2 of the License, or (at your option) any later version.
+* ============================================================================
+* 1999/11/11	acme		set_current_state(TASK_INTERRUPTIBLE), code
+*				cleanup
+* 1999/11/08	acme		init_cyc2x deleted, doing nothing
+* 1999/11/06	acme		back to read[bw], write[bw] and memcpy_to and
+*				fromio to use dpmbase ioremaped
+* 1999/10/26	acme		use isa_read[bw], isa_write[bw] & isa_memcpy_to
+*				& fromio
+* 1999/10/23	acme		cleanup to only supports cyclom2x: all the other
+*				boards are no longer manufactured by cyclades,
+*				if someone wants to support them... be my guest!
+* 1999/05/28    acme		cycx_intack & cycx_intde gone for good
+* 1999/05/18	acme		lots of unlogged work, submitting to Linus...
+* 1999/01/03	acme		more judicious use of data types
+* 1999/01/03	acme		judicious use of data types :>
+*				cycx_inten trying to reset pending interrupts
+*				from cyclom 2x - I think this isn't the way to
+*				go, but for now...
+* 1999/01/02	acme		cycx_intack ok, I think there's nothing to do
+*				to ack an int in cycx_drv.c, only handle it in
+*				cyx_isr (or in the other protocols: cyp_isr,
+*				cyf_isr, when they get implemented.
+* Dec 31, 1998	acme		cycx_data_boot & cycx_code_boot fixed, crossing
+*				fingers to see x25_configure in cycx_x25.c
+*				work... :)
+* Dec 26, 1998	acme		load implementation fixed, seems to work! :)
+*				cycx_2x_dpmbase_options with all the possible
+*				DPM addresses (20).
+*				cycx_intr implemented (test this!)
+*				general code cleanup
+* Dec  8, 1998	Ivan Passos	Cyclom-2X firmware load implementation.
+* Aug  8, 1998	acme		Initial version.
+*/
+
+#include <linux/init.h>		/* __init */
+#include <linux/module.h>
+#include <linux/kernel.h>	/* printk(), and other useful stuff */
+#include <linux/stddef.h>	/* offsetof(), etc. */
+#include <linux/errno.h>	/* return codes */
+#include <linux/sched.h>	/* for jiffies, HZ, etc. */
+#include <linux/cycx_drv.h>	/* API definitions */
+#include <linux/cycx_cfm.h>	/* CYCX firmware module definitions */
+#include <linux/delay.h>	/* udelay */
+#include <asm/io.h>		/* read[wl], write[wl], ioremap, iounmap */
+
+#define	MOD_VERSION	0
+#define	MOD_RELEASE	6
+
+MODULE_AUTHOR("Arnaldo Carvalho de Melo");
+MODULE_DESCRIPTION("Cyclom 2x Sync Card Driver");
+MODULE_LICENSE("GPL");
+
+/* Hardware-specific functions */
+static int load_cyc2x(struct cycx_hw *hw, struct cycx_firmware *cfm, u32 len);
+static void cycx_bootcfg(struct cycx_hw *hw);
+
+static int reset_cyc2x(void __iomem *addr);
+static int detect_cyc2x(void __iomem *addr);
+
+/* Miscellaneous functions */
+static void delay_cycx(int sec);
+static int get_option_index(long *optlist, long optval);
+static u16 checksum(u8 *buf, u32 len);
+
+#define wait_cyc(addr) cycx_exec(addr + CMD_OFFSET)
+
+/* Global Data */
+
+/* private data */
+static char modname[] = "cycx_drv";
+static char fullname[] = "Cyclom 2X Support Module";
+static char copyright[] = "(c) 1998-2003 Arnaldo Carvalho de Melo "
+			  "<acme@conectiva.com.br>";
+
+/* Hardware configuration options.
+ * These are arrays of configuration options used by verification routines.
+ * The first element of each array is its size (i.e. number of options).
+ */
+static long cyc2x_dpmbase_options[] = {
+	20,
+	0xA0000, 0xA4000, 0xA8000, 0xAC000, 0xB0000, 0xB4000, 0xB8000,
+	0xBC000, 0xC0000, 0xC4000, 0xC8000, 0xCC000, 0xD0000, 0xD4000,
+	0xD8000, 0xDC000, 0xE0000, 0xE4000, 0xE8000, 0xEC000
+};
+
+static long cycx_2x_irq_options[]  = { 7, 3, 5, 9, 10, 11, 12, 15 };
+
+/* Kernel Loadable Module Entry Points */
+/* Module 'insert' entry point.
+ * o print announcement
+ * o initialize static data
+ *
+ * Return:	0	Ok
+ *		< 0	error.
+ * Context:	process */
+
+int __init cycx_drv_init(void)
+{
+	printk(KERN_INFO "%s v%u.%u %s\n", fullname, MOD_VERSION, MOD_RELEASE,
+			 copyright);
+
+	return 0;
+}
+
+/* Module 'remove' entry point.
+ * o release all remaining system resources */
+void cycx_drv_cleanup(void)
+{
+}
+
+/* Kernel APIs */
+/* Set up adapter.
+ * o detect adapter type
+ * o verify hardware configuration options
+ * o check for hardware conflicts
+ * o set up adapter shared memory
+ * o test adapter memory
+ * o load firmware
+ * Return:	0	ok.
+ *		< 0	error */
+EXPORT_SYMBOL(cycx_setup);
+int cycx_setup(struct cycx_hw *hw, void *cfm, u32 len, unsigned long dpmbase)
+{
+	int err;
+
+	/* Verify IRQ configuration options */
+	if (!get_option_index(cycx_2x_irq_options, hw->irq)) {
+		printk(KERN_ERR "%s: IRQ %d is invalid!\n", modname, hw->irq);
+		return -EINVAL;
+	}
+
+	/* Setup adapter dual-port memory window and test memory */
+	if (!dpmbase) {
+		printk(KERN_ERR "%s: you must specify the dpm address!\n",
+				modname);
+ 		return -EINVAL;
+	} else if (!get_option_index(cyc2x_dpmbase_options, dpmbase)) {
+		printk(KERN_ERR "%s: memory address 0x%lX is invalid!\n",
+				modname, dpmbase);
+		return -EINVAL;
+	}
+
+	hw->dpmbase = ioremap(dpmbase, CYCX_WINDOWSIZE);
+	hw->dpmsize = CYCX_WINDOWSIZE;
+
+	if (!detect_cyc2x(hw->dpmbase)) {
+		printk(KERN_ERR "%s: adapter Cyclom 2X not found at "
+				"address 0x%lX!\n", modname, dpmbase);
+		return -EINVAL;
+	}
+
+	printk(KERN_INFO "%s: found Cyclom 2X card at address 0x%lX.\n",
+			 modname, dpmbase);
+
+	/* Load firmware. If loader fails then shut down adapter */
+	err = load_cyc2x(hw, cfm, len);
+
+	if (err)
+		cycx_down(hw);         /* shutdown adapter */
+
+	return err;
+}
+
+EXPORT_SYMBOL(cycx_down);
+int cycx_down(struct cycx_hw *hw)
+{
+	iounmap(hw->dpmbase);
+	return 0;
+}
+
+/* Enable interrupt generation.  */
+EXPORT_SYMBOL(cycx_inten);
+void cycx_inten(struct cycx_hw *hw)
+{
+	writeb(0, hw->dpmbase);
+}
+
+/* Generate an interrupt to adapter's CPU. */
+EXPORT_SYMBOL(cycx_intr);
+void cycx_intr(struct cycx_hw *hw)
+{
+	writew(0, hw->dpmbase + GEN_CYCX_INTR);
+}
+
+/* Execute Adapter Command.
+ * o Set exec flag.
+ * o Busy-wait until flag is reset. */
+EXPORT_SYMBOL(cycx_exec);
+int cycx_exec(void __iomem *addr)
+{
+	u16 i = 0;
+	/* wait till addr content is zeroed */
+
+	while (readw(addr)) {
+		udelay(1000);
+
+		if (++i > 50)
+			return -1;
+	}
+
+	return 0;
+}
+
+/* Read absolute adapter memory.
+ * Transfer data from adapter's memory to data buffer. */
+EXPORT_SYMBOL(cycx_peek);
+int cycx_peek(struct cycx_hw *hw, u32 addr, void *buf, u32 len)
+{
+	if (len == 1)
+		*(u8*)buf = readb(hw->dpmbase + addr);
+	else
+		memcpy_fromio(buf, hw->dpmbase + addr, len);
+
+	return 0;
+}
+
+/* Write Absolute Adapter Memory.
+ * Transfer data from data buffer to adapter's memory. */
+EXPORT_SYMBOL(cycx_poke);
+int cycx_poke(struct cycx_hw *hw, u32 addr, void *buf, u32 len)
+{
+	if (len == 1)
+		writeb(*(u8*)buf, hw->dpmbase + addr);
+	else
+		memcpy_toio(hw->dpmbase + addr, buf, len);
+
+	return 0;
+}
+
+/* Hardware-Specific Functions */
+
+/* Load Aux Routines */
+/* Reset board hardware.
+   return 1 if memory exists at addr and 0 if not. */
+static int memory_exists(void __iomem *addr)
+{
+	int tries = 0;
+
+	for (; tries < 3 ; tries++) {
+		writew(TEST_PATTERN, addr + 0x10);
+
+		if (readw(addr + 0x10) == TEST_PATTERN)
+			if (readw(addr + 0x10) == TEST_PATTERN)
+				return 1;
+
+		delay_cycx(1);
+	}
+
+	return 0;
+}
+
+/* Load reset code. */
+static void reset_load(void __iomem *addr, u8 *buffer, u32 cnt)
+{
+	void __iomem *pt_code = addr + RESET_OFFSET;
+	u16 i; /*, j; */
+
+	for (i = 0 ; i < cnt ; i++) {
+/*		for (j = 0 ; j < 50 ; j++); Delay - FIXME busy waiting... */
+		writeb(*buffer++, pt_code++);
+	}
+}
+
+/* Load buffer using boot interface.
+ * o copy data from buffer to Cyclom-X memory
+ * o wait for reset code to copy it to right portion of memory */
+static int buffer_load(void __iomem *addr, u8 *buffer, u32 cnt)
+{
+	memcpy_toio(addr + DATA_OFFSET, buffer, cnt);
+	writew(GEN_BOOT_DAT, addr + CMD_OFFSET);
+
+	return wait_cyc(addr);
+}
+
+/* Set up entry point and kick start Cyclom-X CPU. */
+static void cycx_start(void __iomem *addr)
+{
+	/* put in 0x30 offset the jump instruction to the code entry point */
+	writeb(0xea, addr + 0x30);
+	writeb(0x00, addr + 0x31);
+	writeb(0xc4, addr + 0x32);
+	writeb(0x00, addr + 0x33);
+	writeb(0x00, addr + 0x34);
+
+	/* cmd to start executing code */
+	writew(GEN_START, addr + CMD_OFFSET);
+}
+
+/* Load and boot reset code. */
+static void cycx_reset_boot(void __iomem *addr, u8 *code, u32 len)
+{
+	void __iomem *pt_start = addr + START_OFFSET;
+
+	writeb(0xea, pt_start++); /* jmp to f000:3f00 */
+	writeb(0x00, pt_start++);
+	writeb(0xfc, pt_start++);
+	writeb(0x00, pt_start++);
+	writeb(0xf0, pt_start);
+	reset_load(addr, code, len);
+
+	/* 80186 was in hold, go */
+	writeb(0, addr + START_CPU);
+	delay_cycx(1);
+}
+
+/* Load data.bin file through boot (reset) interface. */
+static int cycx_data_boot(void __iomem *addr, u8 *code, u32 len)
+{
+	void __iomem *pt_boot_cmd = addr + CMD_OFFSET;
+	u32 i;
+
+	/* boot buffer lenght */
+	writew(CFM_LOAD_BUFSZ, pt_boot_cmd + sizeof(u16));
+	writew(GEN_DEFPAR, pt_boot_cmd);
+
+	if (wait_cyc(addr) < 0)
+		return -1;
+
+	writew(0, pt_boot_cmd + sizeof(u16));
+	writew(0x4000, pt_boot_cmd + 2 * sizeof(u16));
+	writew(GEN_SET_SEG, pt_boot_cmd);
+
+	if (wait_cyc(addr) < 0)
+		return -1;
+
+	for (i = 0 ; i < len ; i += CFM_LOAD_BUFSZ)
+		if (buffer_load(addr, code + i,
+				min_t(u32, CFM_LOAD_BUFSZ, (len - i))) < 0) {
+			printk(KERN_ERR "%s: Error !!\n", modname);
+			return -1;
+		}
+
+	return 0;
+}
+
+
+/* Load code.bin file through boot (reset) interface. */
+static int cycx_code_boot(void __iomem *addr, u8 *code, u32 len)
+{
+	void __iomem *pt_boot_cmd = addr + CMD_OFFSET;
+	u32 i;
+
+	/* boot buffer lenght */
+	writew(CFM_LOAD_BUFSZ, pt_boot_cmd + sizeof(u16));
+	writew(GEN_DEFPAR, pt_boot_cmd);
+
+	if (wait_cyc(addr) < 0)
+		return -1;
+
+	writew(0x0000, pt_boot_cmd + sizeof(u16));
+	writew(0xc400, pt_boot_cmd + 2 * sizeof(u16));
+	writew(GEN_SET_SEG, pt_boot_cmd);
+
+	if (wait_cyc(addr) < 0)
+		return -1;
+
+	for (i = 0 ; i < len ; i += CFM_LOAD_BUFSZ)
+		if (buffer_load(addr, code + i,
+				min_t(u32, CFM_LOAD_BUFSZ, (len - i)))) {
+			printk(KERN_ERR "%s: Error !!\n", modname);
+			return -1;
+		}
+
+	return 0;
+}
+
+/* Load adapter from the memory image of the CYCX firmware module.
+ * o verify firmware integrity and compatibility
+ * o start adapter up */
+static int load_cyc2x(struct cycx_hw *hw, struct cycx_firmware *cfm, u32 len)
+{
+	int i, j;
+	struct cycx_fw_header *img_hdr;
+	u8 *reset_image,
+	   *data_image,
+	   *code_image;
+	void __iomem *pt_cycld = hw->dpmbase + 0x400;
+	u16 cksum;
+
+	/* Announce */
+	printk(KERN_INFO "%s: firmware signature=\"%s\"\n", modname,
+							    cfm->signature);
+
+	/* Verify firmware signature */
+	if (strcmp(cfm->signature, CFM_SIGNATURE)) {
+		printk(KERN_ERR "%s:load_cyc2x: not Cyclom-2X firmware!\n",
+				modname);
+		return -EINVAL;
+	}
+
+	printk(KERN_INFO "%s: firmware version=%u\n", modname, cfm->version);
+
+	/* Verify firmware module format version */
+	if (cfm->version != CFM_VERSION) {
+		printk(KERN_ERR "%s:%s: firmware format %u rejected! "
+				"Expecting %u.\n",
+				modname, __FUNCTION__, cfm->version, CFM_VERSION);
+		return -EINVAL;
+	}
+
+	/* Verify firmware module length and checksum */
+	cksum = checksum((u8*)&cfm->info, sizeof(struct cycx_fw_info) +
+					  cfm->info.codesize);
+/*
+	FIXME cfm->info.codesize is off by 2
+	if (((len - sizeof(struct cycx_firmware) - 1) != cfm->info.codesize) ||
+*/
+	if (cksum != cfm->checksum) {
+		printk(KERN_ERR "%s:%s: firmware corrupted!\n",
+				modname, __FUNCTION__);
+		printk(KERN_ERR " cdsize = 0x%x (expected 0x%lx)\n",
+				len - (int)sizeof(struct cycx_firmware) - 1,
+				cfm->info.codesize);
+		printk(KERN_ERR " chksum = 0x%x (expected 0x%x)\n",
+				cksum, cfm->checksum);
+		return -EINVAL;
+	}
+
+	/* If everything is ok, set reset, data and code pointers */
+	img_hdr = (struct cycx_fw_header *)&cfm->image;
+#ifdef FIRMWARE_DEBUG
+	printk(KERN_INFO "%s:%s: image sizes\n", __FUNCTION__, modname);
+	printk(KERN_INFO " reset=%lu\n", img_hdr->reset_size);
+	printk(KERN_INFO "  data=%lu\n", img_hdr->data_size);
+	printk(KERN_INFO "  code=%lu\n", img_hdr->code_size);
+#endif
+	reset_image = ((u8 *)img_hdr) + sizeof(struct cycx_fw_header);
+	data_image = reset_image + img_hdr->reset_size;
+	code_image = data_image + img_hdr->data_size;
+
+	/*---- Start load ----*/
+	/* Announce */
+	printk(KERN_INFO "%s: loading firmware %s (ID=%u)...\n", modname,
+			 cfm->descr[0] ? cfm->descr : "unknown firmware",
+			 cfm->info.codeid);
+
+	for (i = 0 ; i < 5 ; i++) {
+		/* Reset Cyclom hardware */
+		if (!reset_cyc2x(hw->dpmbase)) {
+			printk(KERN_ERR "%s: dpm problem or board not found\n",
+					modname);
+			return -EINVAL;
+		}
+
+		/* Load reset.bin */
+		cycx_reset_boot(hw->dpmbase, reset_image, img_hdr->reset_size);
+		/* reset is waiting for boot */
+		writew(GEN_POWER_ON, pt_cycld);
+		delay_cycx(1);
+
+		for (j = 0 ; j < 3 ; j++)
+			if (!readw(pt_cycld))
+				goto reset_loaded;
+			else
+				delay_cycx(1);
+	}
+
+	printk(KERN_ERR "%s: reset not started.\n", modname);
+	return -EINVAL;
+
+reset_loaded:
+	/* Load data.bin */
+	if (cycx_data_boot(hw->dpmbase, data_image, img_hdr->data_size)) {
+		printk(KERN_ERR "%s: cannot load data file.\n", modname);
+		return -EINVAL;
+	}
+
+	/* Load code.bin */
+	if (cycx_code_boot(hw->dpmbase, code_image, img_hdr->code_size)) {
+		printk(KERN_ERR "%s: cannot load code file.\n", modname);
+		return -EINVAL;
+	}
+
+	/* Prepare boot-time configuration data */
+	cycx_bootcfg(hw);
+
+	/* kick-off CPU */
+	cycx_start(hw->dpmbase);
+
+	/* Arthur Ganzert's tip: wait a while after the firmware loading...
+	   seg abr 26 17:17:12 EST 1999 - acme */
+	delay_cycx(7);
+	printk(KERN_INFO "%s: firmware loaded!\n", modname);
+
+	/* enable interrupts */
+	cycx_inten(hw);
+
+	return 0;
+}
+
+/* Prepare boot-time firmware configuration data.
+ * o initialize configuration data area
+   From async.doc - V_3.4.0 - 07/18/1994
+   - As of now, only static buffers are available to the user.
+     So, the bit VD_RXDIRC must be set in 'valid'. That means that user
+     wants to use the static transmission and reception buffers. */
+static void cycx_bootcfg(struct cycx_hw *hw)
+{
+	/* use fixed buffers */
+	writeb(FIXED_BUFFERS, hw->dpmbase + CONF_OFFSET);
+}
+
+/* Detect Cyclom 2x adapter.
+ *	Following tests are used to detect Cyclom 2x adapter:
+ *       to be completed based on the tests done below
+ *	Return 1 if detected o.k. or 0 if failed.
+ *	Note:	This test is destructive! Adapter will be left in shutdown
+ *		state after the test. */
+static int detect_cyc2x(void __iomem *addr)
+{
+	reset_cyc2x(addr);
+
+	return memory_exists(addr);
+}
+
+/* Miscellaneous */
+/* Get option's index into the options list.
+ *	Return option's index (1 .. N) or zero if option is invalid. */
+static int get_option_index(long *optlist, long optval)
+{
+	int i = 1;
+
+	for (; i <= optlist[0]; ++i)
+		if (optlist[i] == optval)
+			return i;
+
+	return 0;
+}
+
+/* Reset adapter's CPU. */
+static int reset_cyc2x(void __iomem *addr)
+{
+	writeb(0, addr + RST_ENABLE);
+	delay_cycx(2);
+	writeb(0, addr + RST_DISABLE);
+	delay_cycx(2);
+
+	return memory_exists(addr);
+}
+
+/* Delay */
+static void delay_cycx(int sec)
+{
+	set_current_state(TASK_INTERRUPTIBLE);
+	schedule_timeout(sec * HZ);
+}
+
+/* Calculate 16-bit CRC using CCITT polynomial. */
+static u16 checksum(u8 *buf, u32 len)
+{
+	u16 crc = 0;
+	u16 mask, flag;
+
+	for (; len; --len, ++buf)
+		for (mask = 0x80; mask; mask >>= 1) {
+			flag = (crc & 0x8000);
+			crc <<= 1;
+			crc |= ((*buf & mask) ? 1 : 0);
+
+			if (flag)
+				crc ^= 0x1021;
+		}
+
+	return crc;
+}
+
+module_init(cycx_drv_init);
+module_exit(cycx_drv_cleanup);
+
+/* End */