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u-boot/drivers/qe/uccf.c
Heiko Schocher 6e31c62a17 net, qe: add DM support for QE UEC ethernet 
add DM/DTS support for the UEC ethernet on QUICC Engine
Block.

Signed-off-by: Heiko Schocher <hs@denx.de>
Patch-cc: Mario Six <mario.six@gdsys.cc>
Patch-cc: Qiang Zhao <qiang.zhao@nxp.com>
Patch-cc: Holger Brunck <holger.brunck@hitachi-powergrids.com>
Patch-cc: Madalin Bucur <madalin.bucur@oss.nxp.com>

Series-changes: 3
- revert:
  commit "3374264df97b" ("drivers: net: qe: deselect QE when DM_ETH is enabled")
  as now qe works with DM and DM_ETH support.
- fix mailaddress from Holger

Series-changes: 2
- add comments from Qiang Zhao:
  - add device node documentation
  - I did not drop the dm_qe_uec_phy.c and use drivers/net/fsl_mdio.c
    because using drivers/net/fsl_mdio.c leads in none existent
    udevice mdio@3320
    instead boards with DM ETH support should use now this
    driver.
- remove RFC tag

Commit-notes:

- I let the old none DM based implementation in code
  so boards should work with old implementation.
  This Code should be removed if all boards are converted
  to DM/DTS.

- add the DM based qe uec driver under drivers/net/qe

- Therefore copied the files uccf.c uccf.h uec.h from
  drivers/qe. So there are a lot of Codingstyle problems
  currently. I fix them in next version if this RFC
  patch is OK or it needs some changes.

- The dm based driver code is now under drivers/net/qe/dm_qe_uec.c
  Used a lot of functions from drivers/qe/uec.c

- seperated the PHY specific code into seperate file
  drivers/net/qe/dm_qe_uec_phy.c

END
2020-09-17 06:09:53 +02:00

509 lines
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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2006 Freescale Semiconductor, Inc.
*
* Dave Liu <daveliu@freescale.com>
* based on source code of Shlomi Gridish
*/
#include <common.h>
#include <malloc.h>
#include <linux/errno.h>
#include <asm/io.h>
#include <linux/immap_qe.h>
#include "uccf.h"
#include <fsl_qe.h>
#if !defined(CONFIG_DM_ETH)
void ucc_fast_transmit_on_demand(struct ucc_fast_priv *uccf)
{
out_be16(&uccf->uf_regs->utodr, UCC_FAST_TOD);
}
u32 ucc_fast_get_qe_cr_subblock(int ucc_num)
{
switch (ucc_num) {
case 0:
return QE_CR_SUBBLOCK_UCCFAST1;
case 1:
return QE_CR_SUBBLOCK_UCCFAST2;
case 2:
return QE_CR_SUBBLOCK_UCCFAST3;
case 3:
return QE_CR_SUBBLOCK_UCCFAST4;
case 4:
return QE_CR_SUBBLOCK_UCCFAST5;
case 5:
return QE_CR_SUBBLOCK_UCCFAST6;
case 6:
return QE_CR_SUBBLOCK_UCCFAST7;
case 7:
return QE_CR_SUBBLOCK_UCCFAST8;
default:
return QE_CR_SUBBLOCK_INVALID;
}
}
static void ucc_get_cmxucr_reg(int ucc_num, u32 **p_cmxucr,
u8 *reg_num, u8 *shift)
{
switch (ucc_num) {
case 0: /* UCC1 */
*p_cmxucr = &qe_immr->qmx.cmxucr1;
*reg_num = 1;
*shift = 16;
break;
case 2: /* UCC3 */
*p_cmxucr = &qe_immr->qmx.cmxucr1;
*reg_num = 1;
*shift = 0;
break;
case 4: /* UCC5 */
*p_cmxucr = &qe_immr->qmx.cmxucr2;
*reg_num = 2;
*shift = 16;
break;
case 6: /* UCC7 */
*p_cmxucr = &qe_immr->qmx.cmxucr2;
*reg_num = 2;
*shift = 0;
break;
case 1: /* UCC2 */
*p_cmxucr = &qe_immr->qmx.cmxucr3;
*reg_num = 3;
*shift = 16;
break;
case 3: /* UCC4 */
*p_cmxucr = &qe_immr->qmx.cmxucr3;
*reg_num = 3;
*shift = 0;
break;
case 5: /* UCC6 */
*p_cmxucr = &qe_immr->qmx.cmxucr4;
*reg_num = 4;
*shift = 16;
break;
case 7: /* UCC8 */
*p_cmxucr = &qe_immr->qmx.cmxucr4;
*reg_num = 4;
*shift = 0;
break;
default:
break;
}
}
static int ucc_set_clk_src(int ucc_num, qe_clock_e clock, comm_dir_e mode)
{
u32 *p_cmxucr = NULL;
u8 reg_num = 0;
u8 shift = 0;
u32 clk_bits;
u32 clk_mask;
int source = -1;
/* check if the UCC number is in range. */
if ((ucc_num > UCC_MAX_NUM - 1) || ucc_num < 0)
return -EINVAL;
if (!(mode == COMM_DIR_RX || mode == COMM_DIR_TX)) {
printf("%s: bad comm mode type passed\n", __func__);
return -EINVAL;
}
ucc_get_cmxucr_reg(ucc_num, &p_cmxucr, &reg_num, &shift);
switch (reg_num) {
case 1:
switch (clock) {
case QE_BRG1:
source = 1;
break;
case QE_BRG2:
source = 2;
break;
case QE_BRG7:
source = 3;
break;
case QE_BRG8:
source = 4;
break;
case QE_CLK9:
source = 5;
break;
case QE_CLK10:
source = 6;
break;
case QE_CLK11:
source = 7;
break;
case QE_CLK12:
source = 8;
break;
case QE_CLK15:
source = 9;
break;
case QE_CLK16:
source = 10;
break;
default:
source = -1;
break;
}
break;
case 2:
switch (clock) {
case QE_BRG5:
source = 1;
break;
case QE_BRG6:
source = 2;
break;
case QE_BRG7:
source = 3;
break;
case QE_BRG8:
source = 4;
break;
case QE_CLK13:
source = 5;
break;
case QE_CLK14:
source = 6;
break;
case QE_CLK19:
source = 7;
break;
case QE_CLK20:
source = 8;
break;
case QE_CLK15:
source = 9;
break;
case QE_CLK16:
source = 10;
break;
default:
source = -1;
break;
}
break;
case 3:
switch (clock) {
case QE_BRG9:
source = 1;
break;
case QE_BRG10:
source = 2;
break;
case QE_BRG15:
source = 3;
break;
case QE_BRG16:
source = 4;
break;
case QE_CLK3:
source = 5;
break;
case QE_CLK4:
source = 6;
break;
case QE_CLK17:
source = 7;
break;
case QE_CLK18:
source = 8;
break;
case QE_CLK7:
source = 9;
break;
case QE_CLK8:
source = 10;
break;
case QE_CLK16:
source = 11;
break;
default:
source = -1;
break;
}
break;
case 4:
switch (clock) {
case QE_BRG13:
source = 1;
break;
case QE_BRG14:
source = 2;
break;
case QE_BRG15:
source = 3;
break;
case QE_BRG16:
source = 4;
break;
case QE_CLK5:
source = 5;
break;
case QE_CLK6:
source = 6;
break;
case QE_CLK21:
source = 7;
break;
case QE_CLK22:
source = 8;
break;
case QE_CLK7:
source = 9;
break;
case QE_CLK8:
source = 10;
break;
case QE_CLK16:
source = 11;
break;
default:
source = -1;
break;
}
break;
default:
source = -1;
break;
}
if (source == -1) {
printf("%s: Bad combination of clock and UCC\n", __func__);
return -ENOENT;
}
clk_bits = (u32)source;
clk_mask = QE_CMXUCR_TX_CLK_SRC_MASK;
if (mode == COMM_DIR_RX) {
clk_bits <<= 4; /* Rx field is 4 bits to left of Tx field */
clk_mask <<= 4; /* Rx field is 4 bits to left of Tx field */
}
clk_bits <<= shift;
clk_mask <<= shift;
out_be32(p_cmxucr, (in_be32(p_cmxucr) & ~clk_mask) | clk_bits);
return 0;
}
static uint ucc_get_reg_baseaddr(int ucc_num)
{
uint base = 0;
/* check if the UCC number is in range */
if ((ucc_num > UCC_MAX_NUM - 1) || ucc_num < 0) {
printf("%s: the UCC num not in ranges\n", __func__);
return 0;
}
switch (ucc_num) {
case 0:
base = 0x00002000;
break;
case 1:
base = 0x00003000;
break;
case 2:
base = 0x00002200;
break;
case 3:
base = 0x00003200;
break;
case 4:
base = 0x00002400;
break;
case 5:
base = 0x00003400;
break;
case 6:
base = 0x00002600;
break;
case 7:
base = 0x00003600;
break;
default:
break;
}
base = (uint)qe_immr + base;
return base;
}
void ucc_fast_enable(struct ucc_fast_priv *uccf, comm_dir_e mode)
{
ucc_fast_t *uf_regs;
u32 gumr;
uf_regs = uccf->uf_regs;
/* Enable reception and/or transmission on this UCC. */
gumr = in_be32(&uf_regs->gumr);
if (mode & COMM_DIR_TX) {
gumr |= UCC_FAST_GUMR_ENT;
uccf->enabled_tx = 1;
}
if (mode & COMM_DIR_RX) {
gumr |= UCC_FAST_GUMR_ENR;
uccf->enabled_rx = 1;
}
out_be32(&uf_regs->gumr, gumr);
}
void ucc_fast_disable(struct ucc_fast_priv *uccf, comm_dir_e mode)
{
ucc_fast_t *uf_regs;
u32 gumr;
uf_regs = uccf->uf_regs;
/* Disable reception and/or transmission on this UCC. */
gumr = in_be32(&uf_regs->gumr);
if (mode & COMM_DIR_TX) {
gumr &= ~UCC_FAST_GUMR_ENT;
uccf->enabled_tx = 0;
}
if (mode & COMM_DIR_RX) {
gumr &= ~UCC_FAST_GUMR_ENR;
uccf->enabled_rx = 0;
}
out_be32(&uf_regs->gumr, gumr);
}
int ucc_fast_init(struct ucc_fast_inf *uf_info,
struct ucc_fast_priv **uccf_ret)
{
struct ucc_fast_priv *uccf;
ucc_fast_t *uf_regs;
if (!uf_info)
return -EINVAL;
if (uf_info->ucc_num < 0 || (uf_info->ucc_num > UCC_MAX_NUM - 1)) {
printf("%s: Illagal UCC number!\n", __func__);
return -EINVAL;
}
uccf = (struct ucc_fast_priv *)malloc(sizeof(struct ucc_fast_priv));
if (!uccf) {
printf("%s: No memory for UCC fast data structure!\n",
__func__);
return -ENOMEM;
}
memset(uccf, 0, sizeof(struct ucc_fast_priv));
/* Save fast UCC structure */
uccf->uf_info = uf_info;
uccf->uf_regs = (ucc_fast_t *)ucc_get_reg_baseaddr(uf_info->ucc_num);
if (!uccf->uf_regs) {
printf("%s: No memory map for UCC fast controller!\n",
__func__);
return -ENOMEM;
}
uccf->enabled_tx = 0;
uccf->enabled_rx = 0;
uf_regs = uccf->uf_regs;
uccf->p_ucce = (u32 *)&uf_regs->ucce;
uccf->p_uccm = (u32 *)&uf_regs->uccm;
/* Init GUEMR register, UCC both Rx and Tx is Fast protocol */
out_8(&uf_regs->guemr, UCC_GUEMR_SET_RESERVED3 | UCC_GUEMR_MODE_FAST_RX
| UCC_GUEMR_MODE_FAST_TX);
/* Set GUMR, disable UCC both Rx and Tx, Ethernet protocol */
out_be32(&uf_regs->gumr, UCC_FAST_GUMR_ETH);
/* Set the Giga ethernet VFIFO stuff */
if (uf_info->eth_type == GIGA_ETH) {
/* Allocate memory for Tx Virtual Fifo */
uccf->ucc_fast_tx_virtual_fifo_base_offset =
qe_muram_alloc(UCC_GETH_UTFS_GIGA_INIT,
UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
/* Allocate memory for Rx Virtual Fifo */
uccf->ucc_fast_rx_virtual_fifo_base_offset =
qe_muram_alloc(UCC_GETH_URFS_GIGA_INIT +
UCC_FAST_RX_VIRTUAL_FIFO_SIZE_PAD,
UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
/* utfb, urfb are offsets from MURAM base */
out_be32(&uf_regs->utfb,
uccf->ucc_fast_tx_virtual_fifo_base_offset);
out_be32(&uf_regs->urfb,
uccf->ucc_fast_rx_virtual_fifo_base_offset);
/* Set Virtual Fifo registers */
out_be16(&uf_regs->urfs, UCC_GETH_URFS_GIGA_INIT);
out_be16(&uf_regs->urfet, UCC_GETH_URFET_GIGA_INIT);
out_be16(&uf_regs->urfset, UCC_GETH_URFSET_GIGA_INIT);
out_be16(&uf_regs->utfs, UCC_GETH_UTFS_GIGA_INIT);
out_be16(&uf_regs->utfet, UCC_GETH_UTFET_GIGA_INIT);
out_be16(&uf_regs->utftt, UCC_GETH_UTFTT_GIGA_INIT);
}
/* Set the Fast ethernet VFIFO stuff */
if (uf_info->eth_type == FAST_ETH) {
/* Allocate memory for Tx Virtual Fifo */
uccf->ucc_fast_tx_virtual_fifo_base_offset =
qe_muram_alloc(UCC_GETH_UTFS_INIT,
UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
/* Allocate memory for Rx Virtual Fifo */
uccf->ucc_fast_rx_virtual_fifo_base_offset =
qe_muram_alloc(UCC_GETH_URFS_INIT +
UCC_FAST_RX_VIRTUAL_FIFO_SIZE_PAD,
UCC_FAST_VIRT_FIFO_REGS_ALIGNMENT);
/* utfb, urfb are offsets from MURAM base */
out_be32(&uf_regs->utfb,
uccf->ucc_fast_tx_virtual_fifo_base_offset);
out_be32(&uf_regs->urfb,
uccf->ucc_fast_rx_virtual_fifo_base_offset);
/* Set Virtual Fifo registers */
out_be16(&uf_regs->urfs, UCC_GETH_URFS_INIT);
out_be16(&uf_regs->urfet, UCC_GETH_URFET_INIT);
out_be16(&uf_regs->urfset, UCC_GETH_URFSET_INIT);
out_be16(&uf_regs->utfs, UCC_GETH_UTFS_INIT);
out_be16(&uf_regs->utfet, UCC_GETH_UTFET_INIT);
out_be16(&uf_regs->utftt, UCC_GETH_UTFTT_INIT);
}
/* Rx clock routing */
if (uf_info->rx_clock != QE_CLK_NONE) {
if (ucc_set_clk_src(uf_info->ucc_num,
uf_info->rx_clock, COMM_DIR_RX)) {
printf("%s: Illegal value for parameter 'RxClock'.\n",
__func__);
return -EINVAL;
}
}
/* Tx clock routing */
if (uf_info->tx_clock != QE_CLK_NONE) {
if (ucc_set_clk_src(uf_info->ucc_num,
uf_info->tx_clock, COMM_DIR_TX)) {
printf("%s: Illegal value for parameter 'TxClock'.\n",
__func__);
return -EINVAL;
}
}
/* Clear interrupt mask register to disable all of interrupts */
out_be32(&uf_regs->uccm, 0x0);
/* Writing '1' to clear all of envents */
out_be32(&uf_regs->ucce, 0xffffffff);
*uccf_ret = uccf;
return 0;
}
#endif
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