49 static void __ebus_dma_reset(struct ebus_dma_info *p, int no_drain)  in __ebus_dma_reset()  argument
54 	writel(EBDMA_CSR_RESET, p->regs + EBDMA_CSR);  in __ebus_dma_reset()
61 		val = readl(p->regs + EBDMA_CSR);  in __ebus_dma_reset()
71 	struct ebus_dma_info *p = dev_id;  in ebus_dma_irq()  local
75 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_irq()
76 	csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_irq()
77 	writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_irq()
78 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_irq()
81 		printk(KERN_CRIT "ebus_dma(%s): DMA error!\n", p->name);  in ebus_dma_irq()
82 		p->callback(p, EBUS_DMA_EVENT_ERROR, p->client_cookie);  in ebus_dma_irq()
85 		p->callback(p,  in ebus_dma_irq()
88 			    p->client_cookie);  in ebus_dma_irq()
96 int ebus_dma_register(struct ebus_dma_info *p)  in ebus_dma_register()  argument
100 	if (!p->regs)  in ebus_dma_register()
102 	if (p->flags & ~(EBUS_DMA_FLAG_USE_EBDMA_HANDLER |  in ebus_dma_register()
105 	if ((p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) && !p->callback)  in ebus_dma_register()
107 	if (!strlen(p->name))  in ebus_dma_register()
110 	__ebus_dma_reset(p, 1);  in ebus_dma_register()
114 	if (p->flags & EBUS_DMA_FLAG_TCI_DISABLE)  in ebus_dma_register()
117 	writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_register()
123 int ebus_dma_irq_enable(struct ebus_dma_info *p, int on)  in ebus_dma_irq_enable()  argument
129 		if (p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) {  in ebus_dma_irq_enable()
130 			if (request_irq(p->irq, ebus_dma_irq, IRQF_SHARED, p->name, p))  in ebus_dma_irq_enable()
134 		spin_lock_irqsave(&p->lock, flags);  in ebus_dma_irq_enable()
135 		csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_irq_enable()
137 		writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_irq_enable()
138 		spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_irq_enable()
140 		spin_lock_irqsave(&p->lock, flags);  in ebus_dma_irq_enable()
141 		csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_irq_enable()
143 		writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_irq_enable()
144 		spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_irq_enable()
146 		if (p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) {  in ebus_dma_irq_enable()
147 			free_irq(p->irq, p);  in ebus_dma_irq_enable()
155 void ebus_dma_unregister(struct ebus_dma_info *p)  in ebus_dma_unregister()  argument
161 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_unregister()
162 	csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_unregister()
165 		writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_unregister()
168 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_unregister()
171 		free_irq(p->irq, p);  in ebus_dma_unregister()
175 int ebus_dma_request(struct ebus_dma_info *p, dma_addr_t bus_addr, size_t len)  in ebus_dma_request()  argument
184 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_request()
185 	csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_request()
193 	writel(len,      p->regs + EBDMA_COUNT);  in ebus_dma_request()
194 	writel(bus_addr, p->regs + EBDMA_ADDR);  in ebus_dma_request()
198 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_request()
204 void ebus_dma_prepare(struct ebus_dma_info *p, int write)  in ebus_dma_prepare()  argument
209 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_prepare()
210 	__ebus_dma_reset(p, 0);  in ebus_dma_prepare()
219 	if (p->flags & EBUS_DMA_FLAG_TCI_DISABLE)  in ebus_dma_prepare()
222 	writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_prepare()
224 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_prepare()
228 unsigned int ebus_dma_residue(struct ebus_dma_info *p)  in ebus_dma_residue()  argument
230 	return readl(p->regs + EBDMA_COUNT);  in ebus_dma_residue()
234 unsigned int ebus_dma_addr(struct ebus_dma_info *p)  in ebus_dma_addr()  argument
236 	return readl(p->regs + EBDMA_ADDR);  in ebus_dma_addr()
240 void ebus_dma_enable(struct ebus_dma_info *p, int on)  in ebus_dma_enable()  argument
245 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_enable()
246 	orig_csr = csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_enable()
253 		writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_enable()
254 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_enable()