+.. SPDX-License-Identifier: GPL-2.0
+
+=======================
+The 53c700 Driver Notes
+=======================
+
General Description
===================
Compile Time Flags
==================
-A compile time flag is:
+A compile time flag is::
-CONFIG_53C700_LE_ON_BE
+ CONFIG_53C700_LE_ON_BE
define if the chipset must be supported in little endian mode on a big
endian architecture (used for the 700 on parisc).
to drive it off the CPU or bus clock rather than going to the expense
of an extra clock chip). The best operation clock speeds are:
-53c700 - 25MHz
-53c700-66 - 50MHz
-53c710 - 40Mhz
+========= =====
+53c700 25MHz
+53c700-66 50MHz
+53c710 40Mhz
+========= =====
Writing Your Glue Driver
========================
routine into the interrupt line and call NCR_700_detect with the host
template and the new parameters as arguments. You should also call
the relevant request_*_region function and place the register base
-address into the `base' pointer of the host parameters.
+address into the 'base' pointer of the host parameters.
In the release routine, you must free the NCR_700_Host_Parameters that
you allocated, call the corresponding release_*_region and free the
Handling Interrupts
-------------------
-In general, you should just plumb the card's interrupt line in with
+In general, you should just plumb the card's interrupt line in with
request_irq(irq, NCR_700_intr, <irq flags>, <driver name>, host);
The following are a list of the user settable parameters:
clock: (MANDATORY)
-
-Set to the clock speed of the chip in MHz.
+ Set to the clock speed of the chip in MHz.
base: (MANDATORY)
-
-set to the base of the io or mem region for the register set. On 64
-bit architectures this is only 32 bits wide, so the registers must be
-mapped into the low 32 bits of memory.
+ Set to the base of the io or mem region for the register set. On 64
+ bit architectures this is only 32 bits wide, so the registers must be
+ mapped into the low 32 bits of memory.
pci_dev: (OPTIONAL)
-
-set to the PCI board device. Leave NULL for a non-pci board. This is
-used for the pci_alloc_consistent() and pci_map_*() functions.
+ Set to the PCI board device. Leave NULL for a non-pci board. This is
+ used for the pci_alloc_consistent() and pci_map_*() functions.
dmode_extra: (OPTIONAL, 53c710 only)
-
-extra flags for the DMODE register. These are used to control bus
-output pins on the 710. The settings should be a combination of
-DMODE_FC1 and DMODE_FC2. What these pins actually do is entirely up
-to the board designer. Usually it is safe to ignore this setting.
+ Extra flags for the DMODE register. These are used to control bus
+ output pins on the 710. The settings should be a combination of
+ DMODE_FC1 and DMODE_FC2. What these pins actually do is entirely up
+ to the board designer. Usually it is safe to ignore this setting.
differential: (OPTIONAL)
-
-set to 1 if the chip drives a differential bus.
+ Set to 1 if the chip drives a differential bus.
force_le_on_be: (OPTIONAL, only if CONFIG_53C700_LE_ON_BE is set)
-
-set to 1 if the chip is operating in little endian mode on a big
-endian architecture.
+ Set to 1 if the chip is operating in little endian mode on a big
+ endian architecture.
chip710: (OPTIONAL)
-
-set to 1 if the chip is a 53c710.
+ Set to 1 if the chip is a 53c710.
burst_disable: (OPTIONAL, 53c710 only)
-
-disable 8 byte bursting for DMA transfers.
-
+ Disable 8 byte bursting for DMA transfers.
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