2 /* sun_esp.c: ESP front-end for Sparc SBUS systems.
33 	sbus_readl(esp->dma_regs + (REG))
35 	sbus_writel((VAL), esp->dma_regs + (REG))
48 static int esp_sbus_setup_dma(struct esp *esp, struct platform_device *dma_of)  in esp_sbus_setup_dma()  argument
50 	esp->dma = dma_of;  in esp_sbus_setup_dma()
52 	esp->dma_regs = of_ioremap(&dma_of->resource[0], 0,  in esp_sbus_setup_dma()
55 	if (!esp->dma_regs)  in esp_sbus_setup_dma()
60 		esp->dmarev = dvmarev0;  in esp_sbus_setup_dma()
63 		esp->dmarev = dvmaesc1;  in esp_sbus_setup_dma()
66 		esp->dmarev = dvmarev1;  in esp_sbus_setup_dma()
69 		esp->dmarev = dvmarev2;  in esp_sbus_setup_dma()
72 		esp->dmarev = dvmahme;  in esp_sbus_setup_dma()
75 		esp->dmarev = dvmarevplus;  in esp_sbus_setup_dma()
83 static int esp_sbus_map_regs(struct esp *esp, int hme)  in esp_sbus_map_regs()  argument
85 	struct platform_device *op = to_platform_device(esp->dev);  in esp_sbus_map_regs()
89 	 * second is ESP registers.  in esp_sbus_map_regs()
96 	esp->regs = of_ioremap(res, 0, SBUS_ESP_REG_SIZE, "ESP");  in esp_sbus_map_regs()
97 	if (!esp->regs)  in esp_sbus_map_regs()
103 static int esp_sbus_map_command_block(struct esp *esp)  in esp_sbus_map_command_block()  argument
105 	esp->command_block = dma_alloc_coherent(esp->dev, 16,  in esp_sbus_map_command_block()
106 						&esp->command_block_dma,  in esp_sbus_map_command_block()
108 	if (!esp->command_block)  in esp_sbus_map_command_block()
113 static int esp_sbus_register_irq(struct esp *esp)  in esp_sbus_register_irq()  argument
115 	struct Scsi_Host *host = esp->host;  in esp_sbus_register_irq()
116 	struct platform_device *op = to_platform_device(esp->dev);  in esp_sbus_register_irq()
119 	return request_irq(host->irq, scsi_esp_intr, IRQF_SHARED, "ESP", esp);  in esp_sbus_register_irq()
122 static void esp_get_scsi_id(struct esp *esp, struct platform_device *espdma)  in esp_get_scsi_id()  argument
124 	struct platform_device *op = to_platform_device(esp->dev);  in esp_get_scsi_id()
128 	esp->scsi_id = of_getintprop_default(dp, "initiator-id", 0xff);  in esp_get_scsi_id()
129 	if (esp->scsi_id != 0xff)  in esp_get_scsi_id()
132 	esp->scsi_id = of_getintprop_default(dp, "scsi-initiator-id", 0xff);  in esp_get_scsi_id()
133 	if (esp->scsi_id != 0xff)  in esp_get_scsi_id()
136 	esp->scsi_id = of_getintprop_default(espdma->dev.of_node,  in esp_get_scsi_id()
140 	esp->host->this_id = esp->scsi_id;  in esp_get_scsi_id()
141 	esp->scsi_id_mask = (1 << esp->scsi_id);  in esp_get_scsi_id()
144 static void esp_get_differential(struct esp *esp)  in esp_get_differential()  argument
146 	struct platform_device *op = to_platform_device(esp->dev);  in esp_get_differential()
151 		esp->flags |= ESP_FLAG_DIFFERENTIAL;  in esp_get_differential()
153 		esp->flags &= ~ESP_FLAG_DIFFERENTIAL;  in esp_get_differential()
156 static void esp_get_clock_params(struct esp *esp)  in esp_get_clock_params()  argument
158 	struct platform_device *op = to_platform_device(esp->dev);  in esp_get_clock_params()
169 	esp->cfreq = fmhz;  in esp_get_clock_params()
172 static void esp_get_bursts(struct esp *esp, struct platform_device *dma_of)  in esp_get_bursts()  argument
175 	struct platform_device *op = to_platform_device(esp->dev);  in esp_get_bursts()
194 	esp->bursts = bursts;  in esp_get_bursts()
197 static void esp_sbus_get_props(struct esp *esp, struct platform_device *espdma)  in esp_sbus_get_props()  argument
199 	esp_get_scsi_id(esp, espdma);  in esp_sbus_get_props()
200 	esp_get_differential(esp);  in esp_sbus_get_props()
201 	esp_get_clock_params(esp);  in esp_sbus_get_props()
202 	esp_get_bursts(esp, espdma);  in esp_sbus_get_props()
205 static void sbus_esp_write8(struct esp *esp, u8 val, unsigned long reg)  in sbus_esp_write8()  argument
207 	sbus_writeb(val, esp->regs + (reg * 4UL));  in sbus_esp_write8()
210 static u8 sbus_esp_read8(struct esp *esp, unsigned long reg)  in sbus_esp_read8()  argument
212 	return sbus_readb(esp->regs + (reg * 4UL));  in sbus_esp_read8()
215 static int sbus_esp_irq_pending(struct esp *esp)  in sbus_esp_irq_pending()  argument
222 static void sbus_esp_reset_dma(struct esp *esp)  in sbus_esp_reset_dma()  argument
226 	struct platform_device *op = to_platform_device(esp->dev);  in sbus_esp_reset_dma()
229 	can_do_burst16 = (esp->bursts & DMA_BURST16) != 0;  in sbus_esp_reset_dma()
230 	can_do_burst32 = (esp->bursts & DMA_BURST32) != 0;  in sbus_esp_reset_dma()
236 		can_do_burst64 = (esp->bursts & DMA_BURST64) != 0;  in sbus_esp_reset_dma()
239 	if (esp->dmarev != dvmahme) {  in sbus_esp_reset_dma()
244 	switch (esp->dmarev) {  in sbus_esp_reset_dma()
249 		esp->prev_hme_dmacsr = (DMA_PARITY_OFF | DMA_2CLKS |  in sbus_esp_reset_dma()
252 		esp->prev_hme_dmacsr &= ~(DMA_ENABLE | DMA_ST_WRITE |  in sbus_esp_reset_dma()
256 			esp->prev_hme_dmacsr |= DMA_BRST64;  in sbus_esp_reset_dma()
258 			esp->prev_hme_dmacsr |= DMA_BRST32;  in sbus_esp_reset_dma()
261 			esp->prev_hme_dmacsr |= DMA_SCSI_SBUS64;  in sbus_esp_reset_dma()
262 			sbus_set_sbus64(&op->dev, esp->bursts);  in sbus_esp_reset_dma()
268 				printk(KERN_ALERT PFX "esp%d: DMA_PEND_READ "  in sbus_esp_reset_dma()
270 				       esp->host->unique_id);  in sbus_esp_reset_dma()
277 		dma_write32(esp->prev_hme_dmacsr, DMA_CSR);  in sbus_esp_reset_dma()
283 		if (esp->rev != ESP100) {  in sbus_esp_reset_dma()
321 static void sbus_esp_dma_drain(struct esp *esp)  in sbus_esp_dma_drain()  argument
326 	if (esp->dmarev == dvmahme)  in sbus_esp_dma_drain()
333 	if (esp->dmarev != dvmarev3 && esp->dmarev != dvmaesc1)  in sbus_esp_dma_drain()
339 			printk(KERN_ALERT PFX "esp%d: DMA will not drain!\n",  in sbus_esp_dma_drain()
340 			       esp->host->unique_id);  in sbus_esp_dma_drain()
347 static void sbus_esp_dma_invalidate(struct esp *esp)  in sbus_esp_dma_invalidate()  argument
349 	if (esp->dmarev == dvmahme) {  in sbus_esp_dma_invalidate()
352 		esp->prev_hme_dmacsr = ((esp->prev_hme_dmacsr |  in sbus_esp_dma_invalidate()
358 		dma_write32(esp->prev_hme_dmacsr, DMA_CSR);  in sbus_esp_dma_invalidate()
371 				printk(KERN_ALERT PFX "esp%d: DMA will not "  in sbus_esp_dma_invalidate()
372 				       "invalidate!\n", esp->host->unique_id);  in sbus_esp_dma_invalidate()
386 static void sbus_esp_send_dma_cmd(struct esp *esp, u32 addr, u32 esp_count,  in sbus_esp_send_dma_cmd()  argument
393 	sbus_esp_write8(esp, (esp_count >> 0) & 0xff, ESP_TCLOW);  in sbus_esp_send_dma_cmd()
394 	sbus_esp_write8(esp, (esp_count >> 8) & 0xff, ESP_TCMED);  in sbus_esp_send_dma_cmd()
395 	if (esp->rev == FASHME) {  in sbus_esp_send_dma_cmd()
396 		sbus_esp_write8(esp, (esp_count >> 16) & 0xff, FAS_RLO);  in sbus_esp_send_dma_cmd()
397 		sbus_esp_write8(esp, 0, FAS_RHI);  in sbus_esp_send_dma_cmd()
399 		scsi_esp_cmd(esp, cmd);  in sbus_esp_send_dma_cmd()
401 		csr = esp->prev_hme_dmacsr;  in sbus_esp_send_dma_cmd()
407 		esp->prev_hme_dmacsr = csr;  in sbus_esp_send_dma_cmd()
420 		if (esp->dmarev == dvmaesc1) {  in sbus_esp_send_dma_cmd()
426 		scsi_esp_cmd(esp, cmd);  in sbus_esp_send_dma_cmd()
431 static int sbus_esp_dma_error(struct esp *esp)  in sbus_esp_dma_error()  argument
457 	struct esp *esp;  in esp_sbus_probe_one()  local
460 	host = scsi_host_alloc(tpnt, sizeof(struct esp));  in esp_sbus_probe_one()
467 	esp = shost_priv(host);  in esp_sbus_probe_one()
469 	esp->host = host;  in esp_sbus_probe_one()
470 	esp->dev = &op->dev;  in esp_sbus_probe_one()
471 	esp->ops = &sbus_esp_ops;  in esp_sbus_probe_one()
474 		esp->flags |= ESP_FLAG_WIDE_CAPABLE;  in esp_sbus_probe_one()
476 	err = esp_sbus_setup_dma(esp, espdma);  in esp_sbus_probe_one()
480 	err = esp_sbus_map_regs(esp, hme);  in esp_sbus_probe_one()
484 	err = esp_sbus_map_command_block(esp);  in esp_sbus_probe_one()
488 	err = esp_sbus_register_irq(esp);  in esp_sbus_probe_one()
492 	esp_sbus_get_props(esp, espdma);  in esp_sbus_probe_one()
494 	/* Before we try to touch the ESP chip, ESC1 dma can  in esp_sbus_probe_one()
498 	if (esp->dmarev == dvmaesc1) {  in esp_sbus_probe_one()
504 	dev_set_drvdata(&op->dev, esp);  in esp_sbus_probe_one()
506 	err = scsi_esp_register(esp);  in esp_sbus_probe_one()
513 	free_irq(host->irq, esp);  in esp_sbus_probe_one()
516 			  esp->command_block,  in esp_sbus_probe_one()
517 			  esp->command_block_dma);  in esp_sbus_probe_one()
519 	of_iounmap(&op->resource[(hme ? 1 : 0)], esp->regs, SBUS_ESP_REG_SIZE);  in esp_sbus_probe_one()
555 	struct esp *esp = dev_get_drvdata(&op->dev);  in esp_sbus_remove()  local
556 	struct platform_device *dma_of = esp->dma;  in esp_sbus_remove()
557 	unsigned int irq = esp->host->irq;  in esp_sbus_remove()
561 	scsi_esp_unregister(esp);  in esp_sbus_remove()
567 	free_irq(irq, esp);  in esp_sbus_remove()
569 	is_hme = (esp->dmarev == dvmahme);  in esp_sbus_remove()
572 			  esp->command_block,  in esp_sbus_remove()
573 			  esp->command_block_dma);  in esp_sbus_remove()
574 	of_iounmap(&op->resource[(is_hme ? 1 : 0)], esp->regs,  in esp_sbus_remove()
576 	of_iounmap(&dma_of->resource[0], esp->dma_regs,  in esp_sbus_remove()
579 	scsi_host_put(esp->host);  in esp_sbus_remove()
588 		.name = "SUNW,esp",
594 		.name = "esp",
602 		.name = "esp",
610 MODULE_DESCRIPTION("Sun ESP SCSI driver");