Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Zalon 53c7xx device driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * By Richard Hirst (rhirst@linuxcare.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <asm/hardware.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "../parisc/gsc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include "ncr53c8xx.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) MODULE_AUTHOR("Richard Hirst");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) MODULE_DESCRIPTION("Bluefish/Zalon 720 SCSI Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define GSC_SCSI_ZALON_OFFSET 0x800
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define IO_MODULE_EIM		(1*4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define IO_MODULE_DC_ADATA	(2*4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define IO_MODULE_II_CDATA	(3*4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define IO_MODULE_IO_COMMAND	(12*4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define IO_MODULE_IO_STATUS	(13*4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define IOSTATUS_RY		0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define IOSTATUS_FE		0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define IOIIDATA_SMINT5L	0x40000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #define IOIIDATA_MINT5EN	0x20000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define IOIIDATA_PACKEN		0x10000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define IOIIDATA_PREFETCHEN	0x08000000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define IOIIDATA_IOII		0x00000020
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #define CMD_RESET		5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) static struct ncr_chip zalon720_chip __initdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	.revision_id =	0x0f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	.burst_max =	3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	.offset_max =	8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	.nr_divisor =	4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	.features =	FE_WIDE | FE_DIFF | FE_EHP| FE_MUX | FE_EA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) #if 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) /* FIXME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  * Is this function dead code? or is someone planning on using it in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  * future.  The clock = (int) pdc_result[16] does not look correct to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  * me ... I think it should be iodc_data[16].  Since this cause a compile
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  * error with the new encapsulated PDC, I'm not compiling in this function.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * - RB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) /* poke SCSI clock out of iodc data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) static u8 iodc_data[32] __attribute__ ((aligned (64)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) static unsigned long pdc_result[32] __attribute__ ((aligned (16))) ={0,0,0,0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) static int 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) lasi_scsi_clock(void * hpa, int defaultclock)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	int clock, status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	status = pdc_iodc_read(&pdc_result, hpa, 0, &iodc_data, 32 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	if (status == PDC_RET_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 		clock = (int) pdc_result[16];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 		printk(KERN_WARNING "%s: pdc_iodc_read returned %d\n", __func__, status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		clock = defaultclock; 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	printk(KERN_DEBUG "%s: SCSI clock %d\n", __func__, clock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  	return clock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static struct scsi_host_template zalon7xx_template = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	.module		= THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	.proc_name	= "zalon7xx",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static int __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) zalon_probe(struct parisc_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	struct gsc_irq gsc_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	u32 zalon_vers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	int error = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	void __iomem *zalon = ioremap(dev->hpa.start, 4096);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	void __iomem *io_port = zalon + GSC_SCSI_ZALON_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	static int unit = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	struct Scsi_Host *host;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	struct ncr_device device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	__raw_writel(CMD_RESET, zalon + IO_MODULE_IO_COMMAND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	while (!(__raw_readl(zalon + IO_MODULE_IO_STATUS) & IOSTATUS_RY))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 		cpu_relax();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	__raw_writel(IOIIDATA_MINT5EN | IOIIDATA_PACKEN | IOIIDATA_PREFETCHEN,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		zalon + IO_MODULE_II_CDATA);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	/* XXX: Save the Zalon version for bug workarounds? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	zalon_vers = (__raw_readl(zalon + IO_MODULE_II_CDATA) >> 24) & 0x07;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	/* Setup the interrupts first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	** Later on request_irq() will register the handler.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	dev->irq = gsc_alloc_irq(&gsc_irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	printk(KERN_INFO "%s: Zalon version %d, IRQ %d\n", __func__,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 		zalon_vers, dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	__raw_writel(gsc_irq.txn_addr | gsc_irq.txn_data, zalon + IO_MODULE_EIM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	if (zalon_vers == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 		printk(KERN_WARNING "%s: Zalon 1.1 or earlier\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	memset(&device, 0, sizeof(struct ncr_device));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	/* The following three are needed before any other access. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	__raw_writeb(0x20, io_port + 0x38); /* DCNTL_REG,  EA  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	__raw_writeb(0x04, io_port + 0x1b); /* CTEST0_REG, EHP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	__raw_writeb(0x80, io_port + 0x22); /* CTEST4_REG, MUX */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	/* Initialise ncr_device structure with items required by ncr_attach. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	device.chip		= zalon720_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	device.host_id		= 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	device.dev		= &dev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	device.slot.base	= dev->hpa.start + GSC_SCSI_ZALON_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	device.slot.base_v	= io_port;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	device.slot.irq		= dev->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	device.differential	= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	host = ncr_attach(&zalon7xx_template, unit, &device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	if (!host)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	if (request_irq(dev->irq, ncr53c8xx_intr, IRQF_SHARED, "zalon", host)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	  dev_printk(KERN_ERR, &dev->dev, "irq problem with %d, detaching\n ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		     dev->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		goto fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	unit++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	dev_set_drvdata(&dev->dev, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	error = scsi_add_host(host, &dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		goto fail_free_irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	scsi_scan_host(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)  fail_free_irq:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	free_irq(dev->irq, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)  fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	ncr53c8xx_release(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static const struct parisc_device_id zalon_tbl[] __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	{ HPHW_A_DMA, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x00089 }, 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	{ 0, }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) MODULE_DEVICE_TABLE(parisc, zalon_tbl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static int __exit zalon_remove(struct parisc_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	scsi_remove_host(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	ncr53c8xx_release(host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	free_irq(dev->irq, host);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) static struct parisc_driver zalon_driver __refdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	.name =		"zalon",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	.id_table =	zalon_tbl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	.probe =	zalon_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	.remove =	__exit_p(zalon_remove),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int __init zalon7xx_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	int ret = ncr53c8xx_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		ret = register_parisc_driver(&zalon_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		ncr53c8xx_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) static void __exit zalon7xx_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	unregister_parisc_driver(&zalon_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	ncr53c8xx_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) module_init(zalon7xx_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) module_exit(zalon7xx_exit);