ia64/kvm: compilation fix. export account_system_vtime.
[pv_ops_mirror.git] / arch / powerpc / sysdev / qe_lib / ucc_fast.c
blobbcf88e6ce962c872819d86cde1cfd22fb76f0953
1 /*
2 * Copyright (C) 2006 Freescale Semicondutor, Inc. All rights reserved.
4 * Authors: Shlomi Gridish <gridish@freescale.com>
5 * Li Yang <leoli@freescale.com>
7 * Description:
8 * QE UCC Fast API Set - UCC Fast specific routines implementations.
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/errno.h>
18 #include <linux/slab.h>
19 #include <linux/stddef.h>
20 #include <linux/interrupt.h>
21 #include <linux/err.h>
22 #include <linux/module.h>
24 #include <asm/io.h>
25 #include <asm/immap_qe.h>
26 #include <asm/qe.h>
28 #include <asm/ucc.h>
29 #include <asm/ucc_fast.h>
31 void ucc_fast_dump_regs(struct ucc_fast_private * uccf)
33 printk(KERN_INFO "UCC%u Fast registers:\n", uccf->uf_info->ucc_num);
34 printk(KERN_INFO "Base address: 0x%p\n", uccf->uf_regs);
36 printk(KERN_INFO "gumr : addr=0x%p, val=0x%08x\n",
37 &uccf->uf_regs->gumr, in_be32(&uccf->uf_regs->gumr));
38 printk(KERN_INFO "upsmr : addr=0x%p, val=0x%08x\n",
39 &uccf->uf_regs->upsmr, in_be32(&uccf->uf_regs->upsmr));
40 printk(KERN_INFO "utodr : addr=0x%p, val=0x%04x\n",
41 &uccf->uf_regs->utodr, in_be16(&uccf->uf_regs->utodr));
42 printk(KERN_INFO "udsr : addr=0x%p, val=0x%04x\n",
43 &uccf->uf_regs->udsr, in_be16(&uccf->uf_regs->udsr));
44 printk(KERN_INFO "ucce : addr=0x%p, val=0x%08x\n",
45 &uccf->uf_regs->ucce, in_be32(&uccf->uf_regs->ucce));
46 printk(KERN_INFO "uccm : addr=0x%p, val=0x%08x\n",
47 &uccf->uf_regs->uccm, in_be32(&uccf->uf_regs->uccm));
48 printk(KERN_INFO "uccs : addr=0x%p, val=0x%02x\n",
49 &uccf->uf_regs->uccs, uccf->uf_regs->uccs);
50 printk(KERN_INFO "urfb : addr=0x%p, val=0x%08x\n",
51 &uccf->uf_regs->urfb, in_be32(&uccf->uf_regs->urfb));
52 printk(KERN_INFO "urfs : addr=0x%p, val=0x%04x\n",
53 &uccf->uf_regs->urfs, in_be16(&uccf->uf_regs->urfs));
54 printk(KERN_INFO "urfet : addr=0x%p, val=0x%04x\n",
55 &uccf->uf_regs->urfet, in_be16(&uccf->uf_regs->urfet));
56 printk(KERN_INFO "urfset: addr=0x%p, val=0x%04x\n",
57 &uccf->uf_regs->urfset, in_be16(&uccf->uf_regs->urfset));
58 printk(KERN_INFO "utfb : addr=0x%p, val=0x%08x\n",
59 &uccf->uf_regs->utfb, in_be32(&uccf->uf_regs->utfb));
60 printk(KERN_INFO "utfs : addr=0x%p, val=0x%04x\n",
61 &uccf->uf_regs->utfs, in_be16(&uccf->uf_regs->utfs));
62 printk(KERN_INFO "utfet : addr=0x%p, val=0x%04x\n",
63 &uccf->uf_regs->utfet, in_be16(&uccf->uf_regs->utfet));
64 printk(KERN_INFO "utftt : addr=0x%p, val=0x%04x\n",
65 &uccf->uf_regs->utftt, in_be16(&uccf->uf_regs->utftt));
66 printk(KERN_INFO "utpt : addr=0x%p, val=0x%04x\n",
67 &uccf->uf_regs->utpt, in_be16(&uccf->uf_regs->utpt));
68 printk(KERN_INFO "urtry : addr=0x%p, val=0x%08x\n",
69 &uccf->uf_regs->urtry, in_be32(&uccf->uf_regs->urtry));
70 printk(KERN_INFO "guemr : addr=0x%p, val=0x%02x\n",
71 &uccf->uf_regs->guemr, uccf->uf_regs->guemr);
73 EXPORT_SYMBOL(ucc_fast_dump_regs);
75 u32 ucc_fast_get_qe_cr_subblock(int uccf_num)
77 switch (uccf_num) {
78 case 0: return QE_CR_SUBBLOCK_UCCFAST1;
79 case 1: return QE_CR_SUBBLOCK_UCCFAST2;
80 case 2: return QE_CR_SUBBLOCK_UCCFAST3;
81 case 3: return QE_CR_SUBBLOCK_UCCFAST4;
82 case 4: return QE_CR_SUBBLOCK_UCCFAST5;
83 case 5: return QE_CR_SUBBLOCK_UCCFAST6;
84 case 6: return QE_CR_SUBBLOCK_UCCFAST7;
85 case 7: return QE_CR_SUBBLOCK_UCCFAST8;
86 default: return QE_CR_SUBBLOCK_INVALID;
89 EXPORT_SYMBOL(ucc_fast_get_qe_cr_subblock);
91 void ucc_fast_transmit_on_demand(struct ucc_fast_private * uccf)
93 out_be16(&uccf->uf_regs->utodr, UCC_FAST_TOD);
95 EXPORT_SYMBOL(ucc_fast_transmit_on_demand);
97 void ucc_fast_enable(struct ucc_fast_private * uccf, enum comm_dir mode)
99 struct ucc_fast *uf_regs;
100 u32 gumr;
102 uf_regs = uccf->uf_regs;
104 /* Enable reception and/or transmission on this UCC. */
105 gumr = in_be32(&uf_regs->gumr);
106 if (mode & COMM_DIR_TX) {
107 gumr |= UCC_FAST_GUMR_ENT;
108 uccf->enabled_tx = 1;
110 if (mode & COMM_DIR_RX) {
111 gumr |= UCC_FAST_GUMR_ENR;
112 uccf->enabled_rx = 1;
114 out_be32(&uf_regs->gumr, gumr);
116 EXPORT_SYMBOL(ucc_fast_enable);
118 void ucc_fast_disable(struct ucc_fast_private * uccf, enum comm_dir mode)
120 struct ucc_fast *uf_regs;
121 u32 gumr;
123 uf_regs = uccf->uf_regs;
125 /* Disable reception and/or transmission on this UCC. */
126 gumr = in_be32(&uf_regs->gumr);
127 if (mode & COMM_DIR_TX) {
128 gumr &= ~UCC_FAST_GUMR_ENT;
129 uccf->enabled_tx = 0;
131 if (mode & COMM_DIR_RX) {
132 gumr &= ~UCC_FAST_GUMR_ENR;
133 uccf->enabled_rx = 0;
135 out_be32(&uf_regs->gumr, gumr);
137 EXPORT_SYMBOL(ucc_fast_disable);
139 int ucc_fast_init(struct ucc_fast_info * uf_info, struct ucc_fast_private ** uccf_ret)
141 struct ucc_fast_private *uccf;
142 struct ucc_fast *uf_regs;
143 u32 gumr;
144 int ret;
146 if (!uf_info)
147 return -EINVAL;
149 /* check if the UCC port number is in range. */
150 if ((uf_info->ucc_num < 0) || (uf_info->ucc_num > UCC_MAX_NUM - 1)) {
151 printk(KERN_ERR "%s: illegal UCC number\n", __func__);
152 return -EINVAL;
155 /* Check that 'max_rx_buf_length' is properly aligned (4). */
156 if (uf_info->max_rx_buf_length & (UCC_FAST_MRBLR_ALIGNMENT - 1)) {
157 printk(KERN_ERR "%s: max_rx_buf_length not aligned\n",
158 __func__);
159 return -EINVAL;
162 /* Validate Virtual Fifo register values */
163 if (uf_info->urfs < UCC_FAST_URFS_MIN_VAL) {
164 printk(KERN_ERR "%s: urfs is too small\n", __func__);
165 return -EINVAL;
168 if (uf_info->urfs & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
169 printk(KERN_ERR "%s: urfs is not aligned\n", __func__);
170 return -EINVAL;
173 if (uf_info->urfet & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
174 printk(KERN_ERR "%s: urfet is not aligned.\n", __func__);
175 return -EINVAL;
178 if (uf_info->urfset & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
179 printk(KERN_ERR "%s: urfset is not aligned\n", __func__);
180 return -EINVAL;
183 if (uf_info->utfs & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
184 printk(KERN_ERR "%s: utfs is not aligned\n", __func__);
185 return -EINVAL;
188 if (uf_info->utfet & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
189 printk(KERN_ERR "%s: utfet is not aligned\n", __func__);
190 return -EINVAL;
193 if (uf_info->utftt & (UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT - 1)) {
194 printk(KERN_ERR "%s: utftt is not aligned\n", __func__);
195 return -EINVAL;
198 uccf = kzalloc(sizeof(struct ucc_fast_private), GFP_KERNEL);
199 if (!uccf) {
200 printk(KERN_ERR "%s: Cannot allocate private data\n",
201 __func__);
202 return -ENOMEM;
205 /* Fill fast UCC structure */
206 uccf->uf_info = uf_info;
207 /* Set the PHY base address */
208 uccf->uf_regs = ioremap(uf_info->regs, sizeof(struct ucc_fast));
209 if (uccf->uf_regs == NULL) {
210 printk(KERN_ERR "%s: Cannot map UCC registers\n", __func__);
211 return -ENOMEM;
214 uccf->enabled_tx = 0;
215 uccf->enabled_rx = 0;
216 uccf->stopped_tx = 0;
217 uccf->stopped_rx = 0;
218 uf_regs = uccf->uf_regs;
219 uccf->p_ucce = (u32 *) & (uf_regs->ucce);
220 uccf->p_uccm = (u32 *) & (uf_regs->uccm);
221 #ifdef CONFIG_UGETH_TX_ON_DEMAND
222 uccf->p_utodr = (u16 *) & (uf_regs->utodr);
223 #endif
224 #ifdef STATISTICS
225 uccf->tx_frames = 0;
226 uccf->rx_frames = 0;
227 uccf->rx_discarded = 0;
228 #endif /* STATISTICS */
230 /* Set UCC to fast type */
231 ret = ucc_set_type(uf_info->ucc_num, UCC_SPEED_TYPE_FAST);
232 if (ret) {
233 printk(KERN_ERR "%s: cannot set UCC type\n", __func__);
234 ucc_fast_free(uccf);
235 return ret;
238 uccf->mrblr = uf_info->max_rx_buf_length;
240 /* Set GUMR */
241 /* For more details see the hardware spec. */
242 gumr = uf_info->ttx_trx;
243 if (uf_info->tci)
244 gumr |= UCC_FAST_GUMR_TCI;
245 if (uf_info->cdp)
246 gumr |= UCC_FAST_GUMR_CDP;
247 if (uf_info->ctsp)
248 gumr |= UCC_FAST_GUMR_CTSP;
249 if (uf_info->cds)
250 gumr |= UCC_FAST_GUMR_CDS;
251 if (uf_info->ctss)
252 gumr |= UCC_FAST_GUMR_CTSS;
253 if (uf_info->txsy)
254 gumr |= UCC_FAST_GUMR_TXSY;
255 if (uf_info->rsyn)
256 gumr |= UCC_FAST_GUMR_RSYN;
257 gumr |= uf_info->synl;
258 if (uf_info->rtsm)
259 gumr |= UCC_FAST_GUMR_RTSM;
260 gumr |= uf_info->renc;
261 if (uf_info->revd)
262 gumr |= UCC_FAST_GUMR_REVD;
263 gumr |= uf_info->tenc;
264 gumr |= uf_info->tcrc;
265 gumr |= uf_info->mode;
266 out_be32(&uf_regs->gumr, gumr);
268 /* Allocate memory for Tx Virtual Fifo */
269 uccf->ucc_fast_tx_virtual_fifo_base_offset =
270 qe_muram_alloc(uf_info->utfs, UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
271 if (IS_ERR_VALUE(uccf->ucc_fast_tx_virtual_fifo_base_offset)) {
272 printk(KERN_ERR "%s: cannot allocate MURAM for TX FIFO\n",
273 __func__);
274 uccf->ucc_fast_tx_virtual_fifo_base_offset = 0;
275 ucc_fast_free(uccf);
276 return -ENOMEM;
279 /* Allocate memory for Rx Virtual Fifo */
280 uccf->ucc_fast_rx_virtual_fifo_base_offset =
281 qe_muram_alloc(uf_info->urfs +
282 UCC_FAST_RECEIVE_VIRTUAL_FIFO_SIZE_FUDGE_FACTOR,
283 UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
284 if (IS_ERR_VALUE(uccf->ucc_fast_rx_virtual_fifo_base_offset)) {
285 printk(KERN_ERR "%s: cannot allocate MURAM for RX FIFO\n",
286 __func__);
287 uccf->ucc_fast_rx_virtual_fifo_base_offset = 0;
288 ucc_fast_free(uccf);
289 return -ENOMEM;
292 /* Set Virtual Fifo registers */
293 out_be16(&uf_regs->urfs, uf_info->urfs);
294 out_be16(&uf_regs->urfet, uf_info->urfet);
295 out_be16(&uf_regs->urfset, uf_info->urfset);
296 out_be16(&uf_regs->utfs, uf_info->utfs);
297 out_be16(&uf_regs->utfet, uf_info->utfet);
298 out_be16(&uf_regs->utftt, uf_info->utftt);
299 /* utfb, urfb are offsets from MURAM base */
300 out_be32(&uf_regs->utfb, uccf->ucc_fast_tx_virtual_fifo_base_offset);
301 out_be32(&uf_regs->urfb, uccf->ucc_fast_rx_virtual_fifo_base_offset);
303 /* Mux clocking */
304 /* Grant Support */
305 ucc_set_qe_mux_grant(uf_info->ucc_num, uf_info->grant_support);
306 /* Breakpoint Support */
307 ucc_set_qe_mux_bkpt(uf_info->ucc_num, uf_info->brkpt_support);
308 /* Set Tsa or NMSI mode. */
309 ucc_set_qe_mux_tsa(uf_info->ucc_num, uf_info->tsa);
310 /* If NMSI (not Tsa), set Tx and Rx clock. */
311 if (!uf_info->tsa) {
312 /* Rx clock routing */
313 if ((uf_info->rx_clock != QE_CLK_NONE) &&
314 ucc_set_qe_mux_rxtx(uf_info->ucc_num, uf_info->rx_clock,
315 COMM_DIR_RX)) {
316 printk(KERN_ERR "%s: illegal value for RX clock\n",
317 __func__);
318 ucc_fast_free(uccf);
319 return -EINVAL;
321 /* Tx clock routing */
322 if ((uf_info->tx_clock != QE_CLK_NONE) &&
323 ucc_set_qe_mux_rxtx(uf_info->ucc_num, uf_info->tx_clock,
324 COMM_DIR_TX)) {
325 printk(KERN_ERR "%s: illegal value for TX clock\n",
326 __func__);
327 ucc_fast_free(uccf);
328 return -EINVAL;
332 /* Set interrupt mask register at UCC level. */
333 out_be32(&uf_regs->uccm, uf_info->uccm_mask);
335 /* First, clear anything pending at UCC level,
336 * otherwise, old garbage may come through
337 * as soon as the dam is opened. */
339 /* Writing '1' clears */
340 out_be32(&uf_regs->ucce, 0xffffffff);
342 *uccf_ret = uccf;
343 return 0;
345 EXPORT_SYMBOL(ucc_fast_init);
347 void ucc_fast_free(struct ucc_fast_private * uccf)
349 if (!uccf)
350 return;
352 if (uccf->ucc_fast_tx_virtual_fifo_base_offset)
353 qe_muram_free(uccf->ucc_fast_tx_virtual_fifo_base_offset);
355 if (uccf->ucc_fast_rx_virtual_fifo_base_offset)
356 qe_muram_free(uccf->ucc_fast_rx_virtual_fifo_base_offset);
358 kfree(uccf);
360 EXPORT_SYMBOL(ucc_fast_free);