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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c095ff93f9
Since commit 9427ecbed4 ("gpio: Rework of_gpiochip_set_names()
to use device property accessors"), gpio chips have to have a
parent, otherwise devprop_gpiochip_set_names() prematurely exists
with message "GPIO chip parent is NULL" and doesn't proceed
'gpio-line-names' DT property.
This patch wraps the CPM GPIO into a platform driver to allow
assignment of the parent device.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Scott Wood <oss@buserror.net>
172 lines
5.1 KiB
C
172 lines
5.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __CPM_H
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#define __CPM_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/of.h>
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#include <soc/fsl/qe/qe.h>
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/*
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* SPI Parameter RAM common to QE and CPM.
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*/
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struct spi_pram {
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__be16 rbase; /* Rx Buffer descriptor base address */
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__be16 tbase; /* Tx Buffer descriptor base address */
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u8 rfcr; /* Rx function code */
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u8 tfcr; /* Tx function code */
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__be16 mrblr; /* Max receive buffer length */
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__be32 rstate; /* Internal */
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__be32 rdp; /* Internal */
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__be16 rbptr; /* Internal */
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__be16 rbc; /* Internal */
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__be32 rxtmp; /* Internal */
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__be32 tstate; /* Internal */
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__be32 tdp; /* Internal */
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__be16 tbptr; /* Internal */
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__be16 tbc; /* Internal */
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__be32 txtmp; /* Internal */
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__be32 res; /* Tx temp. */
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__be16 rpbase; /* Relocation pointer (CPM1 only) */
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__be16 res1; /* Reserved */
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};
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/*
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* USB Controller pram common to QE and CPM.
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*/
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struct usb_ctlr {
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u8 usb_usmod;
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u8 usb_usadr;
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u8 usb_uscom;
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u8 res1[1];
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__be16 usb_usep[4];
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u8 res2[4];
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__be16 usb_usber;
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u8 res3[2];
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__be16 usb_usbmr;
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u8 res4[1];
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u8 usb_usbs;
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/* Fields down below are QE-only */
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__be16 usb_ussft;
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u8 res5[2];
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__be16 usb_usfrn;
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u8 res6[0x22];
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} __attribute__ ((packed));
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/*
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* Function code bits, usually generic to devices.
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*/
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#ifdef CONFIG_CPM1
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#define CPMFCR_GBL ((u_char)0x00) /* Flag doesn't exist in CPM1 */
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#define CPMFCR_TC2 ((u_char)0x00) /* Flag doesn't exist in CPM1 */
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#define CPMFCR_DTB ((u_char)0x00) /* Flag doesn't exist in CPM1 */
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#define CPMFCR_BDB ((u_char)0x00) /* Flag doesn't exist in CPM1 */
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#else
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#define CPMFCR_GBL ((u_char)0x20) /* Set memory snooping */
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#define CPMFCR_TC2 ((u_char)0x04) /* Transfer code 2 value */
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#define CPMFCR_DTB ((u_char)0x02) /* Use local bus for data when set */
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#define CPMFCR_BDB ((u_char)0x01) /* Use local bus for BD when set */
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#endif
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#define CPMFCR_EB ((u_char)0x10) /* Set big endian byte order */
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/* Opcodes common to CPM1 and CPM2
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*/
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#define CPM_CR_INIT_TRX ((ushort)0x0000)
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#define CPM_CR_INIT_RX ((ushort)0x0001)
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#define CPM_CR_INIT_TX ((ushort)0x0002)
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#define CPM_CR_HUNT_MODE ((ushort)0x0003)
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#define CPM_CR_STOP_TX ((ushort)0x0004)
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#define CPM_CR_GRA_STOP_TX ((ushort)0x0005)
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#define CPM_CR_RESTART_TX ((ushort)0x0006)
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#define CPM_CR_CLOSE_RX_BD ((ushort)0x0007)
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#define CPM_CR_SET_GADDR ((ushort)0x0008)
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#define CPM_CR_SET_TIMER ((ushort)0x0008)
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#define CPM_CR_STOP_IDMA ((ushort)0x000b)
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/* Buffer descriptors used by many of the CPM protocols. */
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typedef struct cpm_buf_desc {
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ushort cbd_sc; /* Status and Control */
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ushort cbd_datlen; /* Data length in buffer */
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uint cbd_bufaddr; /* Buffer address in host memory */
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} cbd_t;
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/* Buffer descriptor control/status used by serial
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*/
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#define BD_SC_EMPTY (0x8000) /* Receive is empty */
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#define BD_SC_READY (0x8000) /* Transmit is ready */
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#define BD_SC_WRAP (0x2000) /* Last buffer descriptor */
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#define BD_SC_INTRPT (0x1000) /* Interrupt on change */
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#define BD_SC_LAST (0x0800) /* Last buffer in frame */
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#define BD_SC_TC (0x0400) /* Transmit CRC */
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#define BD_SC_CM (0x0200) /* Continuous mode */
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#define BD_SC_ID (0x0100) /* Rec'd too many idles */
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#define BD_SC_P (0x0100) /* xmt preamble */
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#define BD_SC_BR (0x0020) /* Break received */
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#define BD_SC_FR (0x0010) /* Framing error */
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#define BD_SC_PR (0x0008) /* Parity error */
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#define BD_SC_NAK (0x0004) /* NAK - did not respond */
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#define BD_SC_OV (0x0002) /* Overrun */
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#define BD_SC_UN (0x0002) /* Underrun */
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#define BD_SC_CD (0x0001) /* */
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#define BD_SC_CL (0x0001) /* Collision */
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/* Buffer descriptor control/status used by Ethernet receive.
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* Common to SCC and FCC.
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*/
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#define BD_ENET_RX_EMPTY (0x8000)
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#define BD_ENET_RX_WRAP (0x2000)
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#define BD_ENET_RX_INTR (0x1000)
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#define BD_ENET_RX_LAST (0x0800)
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#define BD_ENET_RX_FIRST (0x0400)
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#define BD_ENET_RX_MISS (0x0100)
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#define BD_ENET_RX_BC (0x0080) /* FCC Only */
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#define BD_ENET_RX_MC (0x0040) /* FCC Only */
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#define BD_ENET_RX_LG (0x0020)
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#define BD_ENET_RX_NO (0x0010)
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#define BD_ENET_RX_SH (0x0008)
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#define BD_ENET_RX_CR (0x0004)
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#define BD_ENET_RX_OV (0x0002)
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#define BD_ENET_RX_CL (0x0001)
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#define BD_ENET_RX_STATS (0x01ff) /* All status bits */
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/* Buffer descriptor control/status used by Ethernet transmit.
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* Common to SCC and FCC.
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*/
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#define BD_ENET_TX_READY (0x8000)
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#define BD_ENET_TX_PAD (0x4000)
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#define BD_ENET_TX_WRAP (0x2000)
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#define BD_ENET_TX_INTR (0x1000)
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#define BD_ENET_TX_LAST (0x0800)
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#define BD_ENET_TX_TC (0x0400)
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#define BD_ENET_TX_DEF (0x0200)
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#define BD_ENET_TX_HB (0x0100)
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#define BD_ENET_TX_LC (0x0080)
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#define BD_ENET_TX_RL (0x0040)
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#define BD_ENET_TX_RCMASK (0x003c)
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#define BD_ENET_TX_UN (0x0002)
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#define BD_ENET_TX_CSL (0x0001)
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#define BD_ENET_TX_STATS (0x03ff) /* All status bits */
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/* Buffer descriptor control/status used by Transparent mode SCC.
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*/
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#define BD_SCC_TX_LAST (0x0800)
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/* Buffer descriptor control/status used by I2C.
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*/
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#define BD_I2C_START (0x0400)
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#ifdef CONFIG_CPM
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int cpm_command(u32 command, u8 opcode);
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#else
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static inline int cpm_command(u32 command, u8 opcode)
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{
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return -ENOSYS;
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}
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#endif /* CONFIG_CPM */
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int cpm2_gpiochip_add32(struct device *dev);
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#endif
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