50 static void __ebus_dma_reset(struct ebus_dma_info *p, int no_drain)  in __ebus_dma_reset()  argument
55 	writel(EBDMA_CSR_RESET, p->regs + EBDMA_CSR);  in __ebus_dma_reset()
62 		val = readl(p->regs + EBDMA_CSR);  in __ebus_dma_reset()
72 	struct ebus_dma_info *p = dev_id;  in ebus_dma_irq()  local
76 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_irq()
77 	csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_irq()
78 	writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_irq()
79 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_irq()
82 		printk(KERN_CRIT "ebus_dma(%s): DMA error!\n", p->name);  in ebus_dma_irq()
83 		p->callback(p, EBUS_DMA_EVENT_ERROR, p->client_cookie);  in ebus_dma_irq()
86 		p->callback(p,  in ebus_dma_irq()
89 			    p->client_cookie);  in ebus_dma_irq()
97 int ebus_dma_register(struct ebus_dma_info *p)  in ebus_dma_register()  argument
101 	if (!p->regs)  in ebus_dma_register()
103 	if (p->flags & ~(EBUS_DMA_FLAG_USE_EBDMA_HANDLER |  in ebus_dma_register()
106 	if ((p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) && !p->callback)  in ebus_dma_register()
108 	if (!strlen(p->name))  in ebus_dma_register()
111 	__ebus_dma_reset(p, 1);  in ebus_dma_register()
115 	if (p->flags & EBUS_DMA_FLAG_TCI_DISABLE)  in ebus_dma_register()
118 	writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_register()
124 int ebus_dma_irq_enable(struct ebus_dma_info *p, int on)  in ebus_dma_irq_enable()  argument
130 		if (p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) {  in ebus_dma_irq_enable()
131 			if (request_irq(p->irq, ebus_dma_irq, IRQF_SHARED, p->name, p))  in ebus_dma_irq_enable()
135 		spin_lock_irqsave(&p->lock, flags);  in ebus_dma_irq_enable()
136 		csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_irq_enable()
138 		writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_irq_enable()
139 		spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_irq_enable()
141 		spin_lock_irqsave(&p->lock, flags);  in ebus_dma_irq_enable()
142 		csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_irq_enable()
144 		writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_irq_enable()
145 		spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_irq_enable()
147 		if (p->flags & EBUS_DMA_FLAG_USE_EBDMA_HANDLER) {  in ebus_dma_irq_enable()
148 			free_irq(p->irq, p);  in ebus_dma_irq_enable()
156 void ebus_dma_unregister(struct ebus_dma_info *p)  in ebus_dma_unregister()  argument
162 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_unregister()
163 	csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_unregister()
166 		writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_unregister()
169 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_unregister()
172 		free_irq(p->irq, p);  in ebus_dma_unregister()
176 int ebus_dma_request(struct ebus_dma_info *p, dma_addr_t bus_addr, size_t len)  in ebus_dma_request()  argument
185 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_request()
186 	csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_request()
194 	writel(len,      p->regs + EBDMA_COUNT);  in ebus_dma_request()
195 	writel(bus_addr, p->regs + EBDMA_ADDR);  in ebus_dma_request()
199 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_request()
205 void ebus_dma_prepare(struct ebus_dma_info *p, int write)  in ebus_dma_prepare()  argument
210 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_prepare()
211 	__ebus_dma_reset(p, 0);  in ebus_dma_prepare()
220 	if (p->flags & EBUS_DMA_FLAG_TCI_DISABLE)  in ebus_dma_prepare()
223 	writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_prepare()
225 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_prepare()
229 unsigned int ebus_dma_residue(struct ebus_dma_info *p)  in ebus_dma_residue()  argument
231 	return readl(p->regs + EBDMA_COUNT);  in ebus_dma_residue()
235 unsigned int ebus_dma_addr(struct ebus_dma_info *p)  in ebus_dma_addr()  argument
237 	return readl(p->regs + EBDMA_ADDR);  in ebus_dma_addr()
241 void ebus_dma_enable(struct ebus_dma_info *p, int on)  in ebus_dma_enable()  argument
246 	spin_lock_irqsave(&p->lock, flags);  in ebus_dma_enable()
247 	orig_csr = csr = readl(p->regs + EBDMA_CSR);  in ebus_dma_enable()
254 		writel(csr, p->regs + EBDMA_CSR);  in ebus_dma_enable()
255 	spin_unlock_irqrestore(&p->lock, flags);  in ebus_dma_enable()